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1

An Efficient and Green Protocol for the Preparation of Cycloalkanols: A Practical Synthesis of Venlafaxine.

Subhash P. Chavan, Dushant A. Khobragade, Subhash K. Kamat, Latha Sivadasan, Kamalam Balakrishnan, T. Ravindranathan, Mukund K. Gurjar, Uttam R. Kalkote

Journal:

Year:

2005

File:

PDF, 137 KB

2005

2

Utilization of the Versatility of Sulfur in C–C Bond Formation and Cleavage: Synthesis of ABC Taxoid Skeletons

Subhash P. Chavan, Sambhaji P. Chavan, Harikisan R. Sonawane, Uttam R. Kalkote, Surendra G. Sudrik, Rajesh G. Gonnade, Mohan M. Bhadbhade

Journal:

European Journal of Organic Chemistry

Year:

2007

Language:

english

File:

PDF, 134 KB

english, 2007

3

ChemInform Abstract: Efficient Synthesis of Optically Pure (4R,6S)-4-(tert-Butyldimethylsilyloxy)-6- (hydroxymethyl)tetrahydropyran-2-one and Its Enantiomer.

Sandeep R. Ghorpade, Uttam R. Kalkote, Subhash P. Chayan, Sunil R. Bhide, T. Ravindranathan, Veda G. Puranik

Journal:

Year:

2002

File:

PDF, 30 KB

2002

4

An Efficient Co(II) Catalyzed Auto Oxidation of 1,4-Dihydropyridines.

Subhash P. Chavan, Rajendra K. Kharul, Uttam R. Kalkote, I. Shivakumar

Journal:

Year:

2003

File:

PDF, 91 KB

2003

5

Enantioselective Synthesis of L-CCG-I.

Subhash P. Chavan, Pallavi Sharma, Rasapalli Sivappa, Mohan M. Bhadbhade, Rajesh G. Gonnade, Uttam R. Kalkote

Journal:

Year:

2003

File:

PDF, 71 KB

2003

6

The Oxidation of 4-Alkyl and 4-Aryl-1,4-dihydropyridines to Pyridines with Hydrogen Peroxide in an Ionic Liquid.

Sharad P. Panchgalle, Suman M. Choudhary, Subhash P. Chavan, Uttam R. Kalkote

Journal:

Year:

2005

File:

PDF, 20 KB

2005

7

Diastereoselective Amidoalkylation of (3S,7aR)-6-Benzyl-7-hydroxy-3-phenyltetrahydro-5H-imidazo[1,5-c] [1,3]thiazol-5-one: A Short and Highly Efficient Synthesis of (+)-Biotin.

Subhash P. Chavan, Amar G. Chittiboyina, T. Ravindranathan, Subhash K. Kamat, Uttam R. Kalkote

Journal:

Year:

2005

File:

PDF, 34 KB

2005

8

A New Method for the Preparation of 1,2-Benzisoxazole-3-carboxaldehyde.

Uttam R. Kalkote, Sharad P. Panchgalle, Kumodini K. Mahakal, Suman M. Choudhary, Subhash P. Chavan

Journal:

Year:

2005

File:

PDF, 16 KB

2005

9

A Simple, Concise, Stereocontrolled Synthesis of (8E,10Z)-Pentadecadien-1-ol Acetate.

Subhash P. Chavan, Rajendra K. Kharul, Subhash K. Kamat, Uttam R. Kalkote, Ramesh R. Kale

Journal:

Year:

2005

File:

PDF, 22 KB

2005

10

ChemInform Abstract: Studies Toward the Total Synthesis of Carba Analogue of Motif C of M. TB Cell Wall AG Complex.

Mukund K. Gurjar, Challa Nageswar Reddy, Uttam R. Kalkote, Mukund S. Chorghade

Journal:

Year:

2009

File:

PDF, 39 KB

2009

11

ChemInform Abstract: Exploration of L-Proline-Catalyzed α-Aminoxylation of Aldehyde to (S)-Guaifenesin-Related Drug Molecules.

Sharad P. Panchgalle, Sunita S. Kunte, Subhash P. Chavan, Uttam R. Kalkote

Journal:

Year:

2012

File:

PDF, 39 KB

2012

12

Novel enzymatic route for kinetic resolution of (±)1,4-benzodioxan-2-carboxylic acid

Sangita M. Kasture, Rita Varma, Uttam R. Kalkote, Sanjay Nene, Bhaskar D. Kulkarni

Journal:

Biochemical Engineering Journal

Year:

2005

Language:

english

File:

PDF, 182 KB

english, 2005

13

Organocatalytic enantioselective synthesis of β-blockers: (S)-propranolol and (S)-naftopidil

Sharad P. Panchgalle, Rohitkumar G. Gore, Subhash P. Chavan, Uttam R. Kalkote

Journal:

Tetrahedron: Asymmetry

Year:

2009

Language:

english

File:

PDF, 346 KB

english, 2009

14

An efficient and green protocol for the preparation of cycloalkanols: a practical synthesis of venlafaxine

Subhash P. Chavan, Dushant A. Khobragade, Subhash K. Kamat, Latha Sivadasan, Kamalam Balakrishnan, T. Ravindranathan, Mukund K. Gurjar, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2004

Language:

english

File:

PDF, 262 KB

english, 2004

15

A ring closing metathesis approach to the indole alkaloid mitralactonine

Subhash P. Chavan, Pallavi Sharma, R. Sivappa, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2006

Language:

english

File:

PDF, 115 KB

english, 2006

16

The first enantiospecific synthesis of (−)-heritol: absolute configuration determination

Subhash P. Chavan, Mahesh Thakkar, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2007

Language:

english

File:

PDF, 127 KB

english, 2007

17

An enantiospecific synthesis of (+)-isoparvifolinone and (−)-parvifoline

Subhash P. Chavan, Mahesh Thakkar, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2007

Language:

english

File:

PDF, 123 KB

english, 2007

18

A facile total synthesis of (±)-α-cuparenone employing diallylation and RCM as key steps

Subhash P. Chavan, Abasaheb N. Dhawane, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2007

Language:

english

File:

PDF, 105 KB

english, 2007

19

A practical formal synthesis of camptothecin

Subhash P. Chavan, Ashok B. Pathak, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2007

Language:

english

File:

PDF, 104 KB

english, 2007

20

Formal synthesis of (±)-camptothecin via tricyclic lactone as key synthon

Subhash P. Chavan, Abasaheb N. Dhawane, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2010

Language:

english

File:

PDF, 250 KB

english, 2010

21

Enantioselective synthesis of (R)-(+)-α-lipoic acid via proline-catalyzed sequential α-aminoxylation and HWE olefination of aldehyde

Sharad P. Panchgalle, Ganesh F. Jogdand, Subhash P. Chavan, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2010

Language:

english

File:

PDF, 291 KB

english, 2010

22

Asymmetric total synthesis of (2S,3S)-3-hydroxypipecolic acid

Subhash P. Chavan, Nilesh B. Dumare, Kishor R. Harale, Uttam R. Kalkote

Journal:

Tetrahedron Letters

Year:

2011

Language:

english

File:

PDF, 313 KB

english, 2011

23

Novel orthohalogenation reaction. Synthesis of orthochloroarylamines from nitroarenes.

Nagaraj R. Ayyangar, Uttam R. Kalkote, Pandurang V. Nikrad

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 208 KB

english, 1982

24

A practical and scalable process for 4-(R)-hydroxycyclopent-2-en-1-(S)-acetate by desymmetrization of meso-cyclopent-2-en-1,4-diacetate catalyzed by Trichosporon beigelii (NCIM 3326), a cheap biocatalyst

Uttam R Kalkote, Sandeep R Ghorpade, Rohini R Joshi, T Ravindranathan *, Kulbhushan B Bastawade, Digambar V Gokhale

Journal:

Tetrahedron: Asymmetry

Year:

2000

Language:

english

File:

PDF, 176 KB

english, 2000

25

Desymmetrization of meso-cyclopenten-cis-1,4-diol to 4-(R)-hydroxycyclopent-2-en-1-(S)-acetate by irreversible transesterification using Chirazyme®

Sandeep R Ghorpade, Rajendra K Kharul, Rohini R Joshi, Uttam R Kalkote, T Ravindranathan *

Journal:

Tetrahedron: Asymmetry

Year:

1999

Language:

english

File:

PDF, 293 KB

english, 1999

26

Enzymatic kinetic resolution studies of racemic 4-hydroxycyclopent-2-en-1-one using Lipozyme IM®

Sandeep R Ghorpade, Kulbhushan B Bastawade, Digambar V Gokhale, Popat D Shinde, Vishal A Mahajan, Uttam R Kalkote, T Ravindranathan *

Journal:

Tetrahedron: Asymmetry

Year:

1999

Language:

english

File:

PDF, 267 KB

english, 1999

27

Lipases catalyzed enantioselective hydrolysis of (R,S)-methyl 1,4-benzodioxan-2-carboxylate intermediate for (S)-doxazosin mesylate

Rita Varma, Sangita M. Kasture, Sanjay Nene, Uttam R. Kalkote

Journal:

World Journal of Microbiology and Biotechnology

Year:

2008

Language:

english

File:

PDF, 157 KB

english, 2008

28

Organocatalytic asymmetric synthesis of (−)-δ-coniceine based on sequential proline-catalyzed asymmetric α-amination–HWE olefination

Sharad P. Panchgalle, Harshad B. Bidwai, Subhash P. Chavan, Uttam R. Kalkote

Journal:

Tetrahedron: Asymmetry

Year:

2010

Language:

english

File:

PDF, 318 KB

english, 2010

29

A convenient formal synthesis of (2S,3S)-3-hydroxy pipecolic acid

Subhash P. Chavan, Kishor R. Harale, Nilesh B. Dumare, Uttam R. Kalkote

Journal:

Tetrahedron: Asymmetry

Year:

2011

Language:

english

File:

PDF, 338 KB

english, 2011

30

A convenient chemoenzymatic synthesis of (1S,7aS)-1-hydroxy-5-oxo-4-(2′-carboxyethyl)-7a-methyltetrahydro-indane—a key intermediate of steroids

Uttam R. Kalkote, Abhijeet N. Purude, Vedavati G. Puranik, Mukund K. Gurjar

Journal:

Journal of Molecular Catalysis B: Enzymatic

Year:

2006

Language:

english

File:

PDF, 252 KB

english, 2006

31

Studies toward the Total Synthesis of Carba Analogue of Motif C of M. TB Cell Wall AG Complex

K. Gurjar, Mukund, S. Chorghade, Mukund, Nageswar Reddy, Challa, R. Kalkote, Uttam

Journal:

Year:

2009

Language:

english

File:

PDF, 296 KB

english, 2009

32

A highly diastereoselective total synthesis of (±)-heritonin and (±)-heritol

Subhash P. Chavan, Sumanta Garai, Uttam R. Kalkote

Journal:

Year:

2012

Language:

english

File:

PDF, 541 KB

english, 2012

33

Convenient Formal Synthesis of (±)‐Paroxetine

Chavan, Subhash P., Khobragade, Dushant A., Pathak, Ashok B., Kalkote, Uttam R.

Journal:

Synthetic Communications

Year:

2007

Language:

english

File:

PDF, 99 KB

english, 2007

34

Exploration of L-Proline-Catalyzed α-Aminoxylation of Aldehyde to ( S )-Guaifenesin-Related Drug Molecules

Panchgalle, Sharad P., Kunte, Sunita S., Chavan, Subhash P., Kalkote, Uttam R.

Journal:

Synthetic Communications

Year:

2011

Language:

english

File:

PDF, 285 KB

english, 2011

35

Practical Synthesis of (±)‐Venlafaxine

Chavan, Subhash P., Khobragade, Dushant A., Thakkar, Mahesh, Kalkote, Uttam R.

Journal:

Synthetic Communications

Year:

2007

Language:

english

File:

PDF, 108 KB

english, 2007

36

An Efficient Co(II) Catalyzed Auto Oxidation of 1,4-Dihydropyridines

Chavan, Subhash P., Kharul, Rajendra K., Kalkote, Uttam R., Shivakumar, I.

Journal:

Synthetic Communications

Year:

2003

Language:

english

File:

PDF, 179 KB

english, 2003

37

Sn-? molecular sieve catalysed Baeyer?Villiger oxidation in ionic liquid at room temperature

Panchgalle, Sharad P., Kalkote, Uttam R., Niphadkar, Prashant S., Joshi, Praphulla N., Chavan, Subhash P., Chaphekar, Gopal M.

Journal:

Green Chemistry

Year:

2004

Language:

english

File:

PDF, 86 KB

english, 2004

38

Diastereoselective Amidoalkylation of (3 S ,7a R )-6-Benzyl-7-hydroxy-3-phenyltetra- hydro-5 H -imidazo[1,5- c ][1,3]thiazol-5-one : A Short and Highly Efficient Synthesis of (+)-Biotin

Chavan, Subhash P., Chittiboyina, Amar G., Ravindranathan, T., Kamat, Subhash K., Kalkote, Uttam R.

Journal:

Journal of Organic Chemistry

Year:

2005

Language:

english

File:

PDF, 87 KB

english, 2005

39

First Enantiospecific Synthesis of (−)-Parvifoline and (−)-Curcuquinone

Chavan, Subhash P., Thakkar, Mahesh, Jogdand, Ganesh F., Kalkote, Uttam R.

Journal:

Journal of Organic Chemistry

Year:

2006

Language:

english

File:

PDF, 62 KB

english, 2006

40

Enantioselective Synthesis of l -CCG-I †

Chavan, Subhash P., Sharma, Pallavi, Sivappa, Rasapalli, Bhadbhade, Mohan M., Gonnade, Rajesh G., Kalkote, Uttam R.

Journal:

Journal of Organic Chemistry

Year:

2003

Language:

english

File:

PDF, 69 KB

english, 2003

41

Efficient Synthesis of Optically Pure (4 R ,6 S )-4-( tert -Butyldimethylsilyloxy)- 6-(hydroxymethyl)tetrahydropyran-2-one and Its Enantiomer

Ghorpade, Sandeep R., Kalkote, Uttam R., Chavan, Subhash P., Bhide, Sunil R., Ravindranathan, T., Puranik, Veda G.

Journal:

Journal of Organic Chemistry

Year:

2001

Language:

english

File:

PDF, 51 KB

english, 2001

42

Simple, Efficient Chemoenzymatic Synthesis of ( S )-5-( tert -Butyldimethylsilyloxy)-2-cyclohexenone and Enantiomeric Ketone Intermediates of 19-Nor-1α,25-dihydroxyvitamin D 3

Kalkote, Uttam R., Ghorpade, Sandeep R., Chavan, Subhash P., Ravindranathan, T.

Journal:

Journal of Organic Chemistry

Year:

2001

Language:

english

File:

PDF, 72 KB

english, 2001

43

Short and Efficient Synthesis of Rubrolide E

Chavan, Subhash P., Pathak, Ashok B., Pandey, Ankur, Kalkote, Uttam R.

Journal:

Synthetic Communications

Year:

2007

Language:

english

File:

PDF, 194 KB

english, 2007

44

A Simple, Concise, Stereocontrolled Synthesis of ( 8E,10Z )‐Pentadecadien‐1‐ol Acetate

Chavan, Subhash P., Kharul, Rajendra K., Kamat, Subhash K., Kalkote, Uttam R., Kale, Ramesh R.

Journal:

Synthetic Communications

Year:

2005

Language:

english

File:

PDF, 110 KB

english, 2005

45

Phase Transfer Catalysed N-Monoalkylation of Amino Anthraquinones

Ramrao, Kalkote Uttam, Ramkumar, Choudhary Anil, Anant, Natu Arvind, Ramanuja, Ayyangar Nagaraja

Journal:

Synthetic Communications

Year:

1991

Language:

english

File:

PDF, 196 KB

english, 1991

46

Total synthesis of (R)-lipoic acid and (S)-lipoic acid via an Mn (III)-salen-catalyzed oxidative kinetic resolution

Purude, Abhijeet N., Pawar, Kailash P., Patil, Niteen B., Kalkote, Uttam R., Chavan, Subhash P.

Journal:

Tetrahedron: Asymmetry

Year:

2015

Language:

english

File:

PDF, 580 KB

english, 2015

47

Tandem Aza-Michael-Condensation-Aldol Cyclization Reaction: Approach to the Construction of DE Synthon of (±)-Camptothecin

Chavan, Subhash, Dhawane, Abasaheb, Kalkote, Uttam

Journal:

Year:

2008

Language:

english

File:

PDF, 99 KB

english, 2008

48

A Practical and Facile Approach towards Indole Alkaloids: (-)-Mitralactonine

Chavan, Subhash, Sharma, Pallavi, Sivappa, Rasapalli, Kalkote, Uttam

Journal:

Year:

2007

Language:

english

File:

PDF, 75 KB

english, 2007

49

Total Synthesis of (+)-Camptothecin via an Intramolecular Palladium-Catalyzed Cyclization Strategy

Chavan, Subhash, Pathak, Ashok, Kalkote, Uttam

Journal:

Year:

2007

Language:

english

File:

PDF, 197 KB

english, 2007

50

An Efficient and Practical Total Synthesis of (±)-α-Cuparenone

Chavan, Subhash, Dhawane, Abasaheb, Kalkote, Uttam

Journal:

Year:

2007

Language:

english

File:

PDF, 99 KB

english, 2007

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