Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1978-08-01
1979-11-13
Roberts, Elbert L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
2603972, C07J 900
Patent
active
041743458
ABSTRACT:
In the synthesis of sterols wherein methoxyethoxymethyl groups in an ether linkage are attached to the nucleus of the sterol to protect the sterol nucleus during other steps of the synthesis and the sterols are thereafter treated to remove the methoxyethoxymethyl groups and set free the hydroxyl groups, the improvement in which the sterols being treated with zinc bromide are held in a methylene chloride solution containing a small amount of an aliphatic alcohol having from 1 to 6 carbon atoms.
REFERENCES:
Corey et al., "Tetrahedron Letters," (1976), p. 809.
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