Pregnane derivatives

Details Pregnane derivatives Pregnane derivatives

1977-10-12

1980-03-18

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603971, 26039747, 2603975, 2063972, C07J 7100

Patent

active

041939212

ABSTRACT:
The present invention relates to pregnane derivatives of the formula ##STR1## wherein R.sup.1 and R.sup.3 are hydroxyl groups or readily cleavable etherified or esterified hydroxyl groups and R.sup.20 is hydroxymethyl or readily cleavable etherified or esterified hydroxy methyl, formyl, carboxyl or carbalkoxy useful as intermediates for the preparation of 1.alpha.-hydroxycholecalciferols. The present invention also relates to processes for the preparation of the pregnane derivatives and the intermediates thereof.

REFERENCES:
patent: 3901928 (1975-08-01), Hesse et al.
patent: 3907843 (1975-09-01), De Luca et al.
patent: 3966777 (1976-06-01), Mazur et al.
patent: 4022768 (1977-05-01), Matsunaga et al.
patent: 4022891 (1977-05-01), Takeshita et al.
patent: 4046760 (1977-09-01), Jones et al.
patent: 4088760 (1978-05-01), Benson et al.
Barton et al., J.C.S. Chem. Comm. (1974), p. 203.
Barton et al., J. Am. Chem. Soc. 95 (1973), p. 2748.
Steroid Reactions by Dyerossi (1963), pp. 227 and 228.
Mitra et al., "Journal of Organic Chem." 39 (1974), p. 2931.
Lam et al., "Steroids" 26 (1975), p. 422.
Freeman et al. "Tetrahedron Letters" (1975) 261.

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