Compounds, process and intermediates

Details Compounds, process and intermediates Compounds, process and intermediates

1991-05-06

1992-05-05

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549341, C07D31726

Patent

active

051109581

ABSTRACT:
The claimed invention relates to intermediate compounds of the formula ##STR1## wherein R is hydrogen or methyl, R.sub.1 and R.sub.2 each, independently, is hydrogen, lower alkyl or aryl, or taken together are lower alkylene of from 3 to 6 carbon atoms, and the dotted (. . . ) line is an optional bond.

REFERENCES:
patent: 4594432 (1986-06-01), Baggiolini et al.
Wovkulich et al. "Stereoselective Total Synthesis of 1.alpha., 25S, 26-Trihydroxyergocalciferol, Tetrahedron", vol. 40, No. 12, pp. 2283-2296, 1984.
Wovkulich et al. "Synthesis of 1.alpha., 25S-trihydroxy-.DELTA..sup.22 -cholecalciferol", A Potent Inducer of Cell Differentiation: Proceedings of the 6th Workshop on Vitamin D. Merano, Italy, Mar. 1985.
Lythgoe, et al., Calciferol and its Relatives, Part 22, A Direct Total Synthesis of Vitamin D.sub.2 and VitaminD.sub.3, J. C. S. Perkin I, pp. 590-595, 1978.
Abstract #201, ACS Meeting 1983.
Reinhardt, et al., Biochem. Biophys, Res. Commun, 99, 302-307 (1981).
Partridge, et al., Helv Chim. Acta. 64, 2138-2141 (1981).
Baggiolini, et al., J. Am. Chem. Soc. 104, 2945-48 (1982).

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