Studies on Steroidal Plant-Growth :Regulators: A New Synthesis of Brassinosteroids
作者:Wei-Shan Zhou、Yi-Pine Zhou、Biao Jiang
DOI:10.1055/s-1989-27273
日期:——
Two brassinosteroids (stereoisomers of brassinolide), (22R,23R,24R)-2α,3α,22,23-tetrahydroxy-B-homo-7-oxa-5α-ergostan-6-one (2) and (22S,23S,24R)-2α,3α,22, 23-tetrahydroxy-B-homo-7-oxa-5α-ergostan-6-one (3), were synthesized from ergosterol in eight steps in ca. 30% overall yield. The key step is the highly regioselective formation of the 7-oxalactone ring by oxidation of an enol silyl ether with 3-chloroperoxybenzoic acid.
Anastasia, Mario; Ciuffreda, Pierangela; Fiecchi, Alberto, Journal of the Chemical Society. Perkin transactions I, 1983, # 2, p. 379 - 382
作者:Anastasia, Mario、Ciuffreda, Pierangela、Fiecchi, Alberto
DOI:——
日期:——
Takatsuto, Suguru; Ikekawa, Nobuo, Chemical and pharmaceutical bulletin, 1984, vol. 32, p. 2001 - 2004
作者:Takatsuto, Suguru、Ikekawa, Nobuo
DOI:——
日期:——
Configurational assignment of brassinosteroid sidechain by exciton coupled circular dichroic spectroscopy
作者:Akira Kawamura、Nina Berova、Koji Nakanishi、Brunhilde Voigt、Günter Adam
DOI:10.1016/s0040-4020(97)00709-6
日期:1997.9
A microscale method was developed to determine the sidechain configuration of brassinosteroids, a class of potent plant growth promoters. Microscale naphthoylation followed by circular dichroic (CD) spectroscopy measurement in acetonitrile unambiguously differentiate between the two possible vicinal syn-diol configurations, (22R,23R) and (22S,23S). (C) 1997 Elsevier Science Ltd.
TAKATSUTO, SUGURU;MURAMATSU, MASAHITO;OHYA, YOSHIE;HAYASHI, SEIICHI;SHIDA+, ARG. AND BIOL. CHEM., 52,(1988) N 8, C. 2059-2064