Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1987-04-06
1989-10-17
Berch, Mark L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
540 16, C07J 1900, C07J 2100, C07J 5300, C07J 6300
Patent
active
048745510
ABSTRACT:
Novel .delta.-lactone derivatives which are useful as intermediate for a synthesis of brassinolide, epibrassinolide or bisnorbrassinolide and a process of preparing them are disclosed.
According to the process of the present invention, the introduction of carbon chains which form polyhydroxylated steroid side chains of brassinolides or the like into steroid nucleus is carried out in one-step with the control of stereochemistry of the contiguous four acyclic chiral centers.
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Kametani et al., Chem. Abs 105, 191498 (1986).
Kametani et al., Chem. Abs 107, 154592.
Takatsuto, Phytochemistry 1984, 23, 525.
Anastasia, J. Chem. Soc. Perkin I, 1983, 383.
Fung, J. Amer. Chem. Soc. 102, 6580 (1980).
Brown, J. Org. Chem. 44, 5003 (1979).
Honda Toshio
Kametani Tetsuji
Berch Mark L.
Itaro Horiuchi & Co., Ltd
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