Regular Issue

Vol. 20, No. 10, 1983

35 data found. 31 - 35 listedFirst Previous
Report | Regular issue | Vol 20, No. 10, 1983, pp. 2039 - 2046
Published online:
DOI: 10.3987/R-1983-10-2039
Synthesis of New Weitz Type π-Donors and Formation of Charge Transfer Complexes

Mikio Hori, Tadashi Kataoka, Hiroshi Shimizu, Hitoshi Satoh, Hiroshi Mikawa, and Takashi Nogami

*Department of Pharmacognosy, Gifu College of Pharmacy, 6-1 Mitahora-higashi 5-chome, Gifu 502-8585, Japan

Abstract

Several iso-π-electronic thia-heteroanalogues of heptafulvalene were synthesized by Wittig-Horner reaction of the corresponding tropones with 2-diethoxyphosphinyl-1,3-benzodithiole. Some of them reacted with π-acceptors such as TCNQ or DDQ in hot MeCN to give new stable charge transfer complexes.

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Report | Regular issue | Vol 20, No. 10, 1983, pp. 2047 - 2050
Published online:
DOI: 10.3987/R-1983-10-2047
Sulfer Nitride in Organic Chemistry. 12 The Reaction of N4S4 with 1-Aryl-1-trimethylsilyloxyethylenes Affording 3-Hydroxy-4-aryl-1,2,5-thiadiazoles

Shuntaro Mataka, Kazufumi Takahashi, and Masashi Tashiro

*Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-koen, Kasuga 816-8580, Japan

Abstract

Reaction of N4S4 with 1-aryl-1-trimethylsilyloxyethylenes (1a-1e) gave 3-hydroxy-4-aryl-1,2,5-thiadiazoles (2a-2e) though the yields were low. 3-Amino-4-thienyl-1,2,5-thiadiazole (3) was obtained as a minor product.

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Report | Regular issue | Vol 20, No. 10, 1983, pp. 2051 - 2054
Published online:
DOI: 10.3987/R-1983-10-2051
Synthesis of 1,2,3,4-Tetrahydro-1-benzazocin-5(6H)-ones by Dieckmann Condensation

Keiichi Nomura, Shinji Suda, Makoto Takeuchi, Jun Adachi, and Katsutada Masuda

*Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama, Toyama 930-0194, Japan

Abstract

Tetrahydro-1-benzazocin-5(6H)-ones (5,6,8-10) have been conveniently prepared by the Dieckmann condensation of the diester 1 and 3, or the ester nitrile 4 by using sodium-potassium alloy as an effective base.

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Report | Regular issue | Vol 20, No. 10, 1983, pp. 2055 - 2057
Published online:
DOI: 10.3987/R-1983-10-2055
Limousamine: A 4-Hydroxylated Cularine Alkaloid

Daovy P. Allais and Hélèna Guinaudeau

*Faculté de Médecine et de Pharmacie, Université de Limoges, 87032 Limoges Cedex, France

Abstract

Limousamine (5), the first C-4 hydroxylated cularine alkaloid, has been obtained from Corydalis claviculata (L.) DC (Fumariaceae).

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Review | Regular issue | Vol 20, No. 10, 1983, pp. 2059 - 2075
Published online:
DOI: 10.3987/R-1983-10-2059
Forty Years of Tryptofun

Bernhard Witkop

*National Institute of Health, 9000 Rockville Pike, Bethesda, MD 20892-0815, U.S.A.

Abstract

Almost every atom in free or bound tryptophan is capable of reacting selectively under appropriate conditions, both in vitro as well as in vivo. An organic chemist’s approach to this challenging problem in differential and selective reactivity, covering a span of more than forty years, is presented with due emphasis on the historical contributions from Japan before and during the NIH Visiting Program, started more than a quarter century ago.

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