Roy M. Letcher: search on Z-Library

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1

Photochemical cyclisation of 2-iodostilbenes

Letcher, Roy M., Wong, Kum-Moon

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 311 KB

english, 1977

2

ChemInform Abstract: Synthesis of C-Ring Substituted Xanthones from the [4 + 2] Cycloaddition Reaction of Vinylchromones and Acyclic Enamines.

Avijit S. Kelkar, Roy M. Letcher, Kung-Kai Cheung, Kwei-Fung Chiu, Geoffrey D. Brown

Journal:

Year:

2001

File:

PDF, 36 KB

2001

3

o-Naphthoquinones from the heartwood of Azanza garckeana

Roy M. Letcher, I.M. Shirley

Journal:

Year:

1992

Language:

english

File:

PDF, 301 KB

english, 1992

4

3H-indoles and acetylenecarboxylic esters

Roy M. Letcher, Della W.M. Sin

Journal:

Tetrahedron Letters

Year:

1987

Language:

english

File:

PDF, 124 KB

english, 1987

5

Structure and synthesis of the growth inhibitor batatasin I from Dioscorea batatas

Journal:

Year:

1973

Language:

english

File:

PDF, 118 KB

english, 1973

6

Phenolic compounds from the heartwood of Dalbergia nitidula

Roy M. Letcher, Ian M. Shirley

Journal:

Year:

1976

Language:

english

File:

PDF, 333 KB

english, 1976

7

Structure elucidation of a natural product

Letcher, Roy M.

Journal:

Journal of Chemical Education

Year:

1983

Language:

english

File:

PDF, 1.99 MB

english, 1983

8

Reactions of an indeno[1,2-b]indole and novel rearrangements of a dioxodibenz[b,f]azocine to derivatives of 5,12-diaza- and 5-oxa-12-aza-chrysene

Letcher, Roy M., Ng, Kai-Wing, Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1987

Language:

english

File:

PDF, 158 KB

english, 1987

9

Structure of orchinol, loroglossol, and hircinol

Letcher, Roy M., Nhamo, Llewellyn R. M.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1973

Language:

english

File:

PDF, 379 KB

english, 1973

10

Addition reactions of heterocyclic compounds. Part 77. Reaction of dimethyl acetylenedicarboxylate with 2- and 3-alkyl substituted indoles and the formation of (1 + 1 DMAD?CH4O) adducts

Letcher, Roy M., Choi, Michael C. K., Acheson, R. Morrin, Prince, Richard J.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1983

Language:

english

File:

PDF, 508 KB

english, 1983

11

A Concise Total Synthesis of Triptolide

Yang, Dan, Ye, Xiang-Yang, Xu, Ming, Pang, Kwan-Wah, Zou, Ning, Letcher, Roy M.

Journal:

Journal of Organic Chemistry

Year:

1998

Language:

english

File:

PDF, 48 KB

english, 1998

12

Synthesis of azanzone A, a new naturally occurring o-naphthoquinone

Letcher, Roy M., Wong, Man-Ching

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1992

Language:

english

File:

PDF, 432 KB

english, 1992

13

Reactions of 5-Methyl-6-thioxo-5,6,11,12-tetrahydrodibenzo[b,f]azocin-12-one and a Novel Rearrangement to a Hydroximino-isothrochromene

Letcher, Roy M., Cheung, Kung-Kai, Lo, Wing-Hong

Journal:

Journal of Chemical Research

Year:

1998

Language:

english

File:

PDF, 120 KB

english, 1998

14

First synthesis of spiro[benzofuran-2,1?-isobenzofuran]-3,3?-dione and its X-ray crystal structure

Letcher, Roy M., Kwok, Nai-Chiu, Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1992

Language:

english

File:

PDF, 362 KB

english, 1992

15

Some novel transformations in indole chemistry

Acheson, R. Morrin, Letcher, Roy M., Procter, Garry

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1978

Language:

english

File:

PDF, 170 KB

english, 1978

16

The synthesis of various cycloalkana[d ]xanthones and conversion of the cyclohexa-analogue to a 7,7a-dimethylcyclohexa[d ]xanthene †

Letcher, Roy M., Yue, Tai-Yuen, Chiu, Kwei-Fung, Kelkar, Avijit S., Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1998

Language:

english

File:

PDF, 206 KB

english, 1998

17

Synthesis of C-ring substituted xanthones from the [4 + 2] cycloaddition reaction of vinylchromones and acyclic enamines

Kelkar, Avijit S., Letcher, Roy M., Cheung, Kung-Kai, Chiu, Kwei-Fung, Brown, Geoffrey D.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

2000

Language:

english

File:

PDF, 205 KB

english, 2000

18

A novel synthesis of cyclopenta- and cyclohexa-[d]xanthones from the reaction between cycloalkyl enamines and 2-hydroxyphenylpentene-1,3-diones, and their rearrangement to cyclopenta- and cyclohexa-[a]xanthones

Letcher, Roy M., Yue, Tai-Yuen, Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1993

Language:

english

File:

PDF, 248 KB

english, 1993

19

Corrigenda

Zheng, Changsheng, Phillips, Robert S., Bandzouzi, Alphonse, Lakhrissi, Mohammed, Chapleur, Yves, Letcher, Roy M., Kwok, Nai-Chiu, Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1992

Language:

english

File:

PDF, 75 KB

english, 1992

20

Addition reactions of heterocyclic compounds. Part 79. Reaction of dimethyl acetylenedicarboxylate with some cyclohept[b]indoles and cyclo-oct[b]indoles

Letcher, Roy M., Choi, Michael C. K., Acheson, R. Morrin

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1983

Language:

english

File:

PDF, 1.34 MB

english, 1983

21

Structure and synthesis of the phenanthrenes Tal and TaV from Tamus communis

Letcher, Roy M., Wong, Kum-Moon

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1978

Language:

english

File:

PDF, 626 KB

english, 1978

22

Oxazolo[3,2-a]indoles, pyrrolo- and azepino-[1,2-a]indoles from 3H-indole 1-oxides and acetylenecarboxylic esters by skeletal rearrangements

Letcher, Roy M., Sin, Della W. M., Cheung, Kung-Kai

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1993

Language:

english

File:

PDF, 718 KB

english, 1993

23

Addition reactions of heterocyclic compounds. Part 78. Reaction of dimethyl acetylenedicarboxylate with some cyclopent[b]indoles and cyclohex[b]indoles and the crystal structure of (Z)-methyl 1-methoxycarbonylmethyl-11-methoxycarbonylmethylene-12-oxo-1,1a,1b,2,3,4,4a,8,9,9a-decahydro-1b,4a-epoxyethanoindolizino-[2,3,4,5,6-jklm]carbazole-1-carboxylate

Letcher, Roy M., Choi, Michael C. K., Mak, Thomas C. W., Acheson, R. Morrin

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1983

Language:

english

File:

PDF, 1024 KB

english, 1983

24

A new xanthone synthesis from the Diels?Alder reaction between 2-vinylchromen-4-ones and cyclopentanone enamine

Letcher, Roy M., Yue, Tai-Yuen

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1992

Language:

english

File:

PDF, 180 KB

english, 1992

25

Novel heterocycles from 5-methyldibenz[b,f ]azocin-6,12-dione and its derivatives

Letcher, Roy M., Kwok, Nai-Chiu, Lo, Wing-Hong, Ng, Kai-Wing

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1998

Language:

english

File:

PDF, 184 KB

english, 1998

26

Chemical constituents of the combretaceae. Part IV. Phenanthrene derivatives from the heartwood of Combretum hereroense

Letcher, Roy M., Nhamo, Llewellyn R. M.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1973

Language:

english

File:

PDF, 324 KB

english, 1973

27

The crystal structures of (Z)-dimethyl 3-methoxycarbonylmethyl-11-methyl-2-oxo-1,4,5,6,6a,11-hexahydrofuro [2?,3?:2,3]cyclohexa[1,2-b]-indol-6a-ylfumarate, (E)-dimethyl-3-methoxycarbonylmethyl-12-methyl-2-oxo-4,5,6,7,7a,12-hexahydro-1H-furo[2?,3?:2,3]cyclohepta-[1,2-b]indol-7a-ylmaleate, and trimethyl 6-bromo-9-methyl-2-oxo-1,2,3,9a-tetrahydro-3,9a-ethenocarbazole-1-spirocyclopentane-4,10,11-tricarboxylate

Letcher, Roy M., Lai, Ting-Fong, Cheung, Kung-Kai, Choi, Michael C. K., Mak, Thomas C. W.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1983

Language:

english

File:

PDF, 882 KB

english, 1983

28

Phenol oxidation and biosynthesis. Part XXII. The alkaloids of Erythrina lysistemon, E. abyssinica, E. poeppigiana, E. fusca, and E. Lithosperma; the structure of erythratidine

Barton, Derek H. R., Gunatilaka, Abeysinghe A. L., Letcher, Roy M., Lobo, Awa M. F. T., Widdowson, David A.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1973

Language:

english

File:

PDF, 942 KB

english, 1973

29

A review of ecological impacts of global climate change on persistent organic pollutant and mercury pathways and exposures in arctic marine ecosystems

Mckinney, Melissa A., Pedro, Sara, Dietz, Rune, Sonne, Christian, Fisk, Aaron T., Roy, Denis, Jenssen, Bjørn M., Letcher, Robert J.

Journal:

Current Zoology

Year:

2015

Language:

english

File:

PDF, 2.08 MB

english, 2015

30

Structure and synthesis of the phenanthrenes TaIV and TaVIII from Tamus communis

Letcher, Roy M., Wong, Kum-Moon

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1979

Language:

english

File:

PDF, 231 KB

english, 1979

31

Addition reactions of heterocyclic compounds. Part 75. Reactions of dimethyl acetylenedicarboxylate with some N-methylindoles

Acheson, R. Morrin, Choi, Michael C. K., Letcher, Roy M.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1981

Language:

english

File:

PDF, 626 KB

english, 1981

32

ChemInform Abstract: STRUCTURE OF ORCHINOL, LOROGLOSSOL, AND HIRCINOL

LETCHER, ROY M., NHAMO, LLEWELLYN R. M.

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 79 KB

1973

33

Effects of Gamma Irradiation upon the Mechanical and Chemical Properties of 3D-Printed Samples of Poly Lactic Acid

West, Conrad, McTaggart, Robert, Letcher, Todd, Raynie, Douglas, Roy, Ranen

Journal:

Journal of Manufacturing Science and Engineering

Year:

2019

Language:

english

File:

PDF, 1.04 MB

english, 2019

34

ChemInform Abstract: CHEMICAL CONSTITUENTS OF THE COMBRETACEAE PART 4, PHENANTHRENE DERIVATIVES FROM THE HEARTWOOD OF COMBRETUM HEREROENSE

LETCHER, ROY M., NHAMO, LLEWELLYN R. M.

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 98 KB

1973

35

Addition reactions of heterocyclic compounds. Part 72. Dimethyl acetylenedicarboxylate with 1,2,6,7,8,9-hexahydropyrrolo[3,2,1-jk]carbazole

Acheson, R. Morrin, Letcher, Roy M., Procter, Garry

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1980

Language:

english

File:

PDF, 512 KB

english, 1980

36

ChemInform Abstract: PHENOL-OX. UND BIOSYNTH. 22. MITT. ALKALOIDE AUS ERYTHRINA LYSISTEMON, E. ABYSSINICA, E. PEOPPIGIANA, E. FUSCA UND E. LITHOSPERMA, STRUKTUR VON ERYTHATIDIN

BARTON, DEREK H. R., GUNATILAKA, ABEYSINGHE A. L., LETCHER, ROY M., LOBO, AWA M. F. T., WIDDOWSON, DAVID A.

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 97 KB

1973

37

Impacts of small dams on stream temperature

Zaidel, Peter A., Roy, Allison H., Houle, Kristopher M., Lambert, Beth, Letcher, Benjamin H., Nislow, Keith H., Smith, Christopher

Journal:

Ecological Indicators

Year:

2021

File:

PDF, 57 KB

2021

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