6,6-ethyl enedioxy-22R-hydroxy-2R,3S-isopropylidendioxy-5.alpha.

Details 6,6-ethyl enedioxy-22R-hydroxy-2R,3S-isopropylidendioxy-5.alpha. 6,6-ethyl enedioxy-22R-hydroxy-2R,3S-isopropylidendioxy-5.alpha.

1990-05-21

1992-07-07

Waddell, Frederick E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

552508, 552553, C07J 7100, C07J 5300, A61K 3158

Patent

active

051284642

ABSTRACT:
6,6-Ethylenedioxy-22R-hydroxy-2R,3S-isopropylidenedioxy-5.alpha.-cholest-23 -yne, useful as an intermediate for the synthesis of brassinolide.

REFERENCES:
patent: 397687 (1967-01-01), Feldman et al.
patent: 3365474 (1968-01-01), Fried
patent: 3378549 (1968-04-01), Edwards et al.
Sakakibara et al., "Improved Synthesis of Brassinolide", Agrie, Biol. Chem., 47(3), 663-664 (1983).
Sakakibara et al., Heterocycles, 17, 301 (1982).
K. Mori et al., Tetrahedron, 38, 2099 (1982).
Aburatani et al., Agric. Biol. Chem., 49 (12), pp. 3557-3562, (1985).

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