Detail of "28319-72-4"

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3-Methoxy-Androsta-3,5,9(11)-Triene-19-One

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16-Methylene steroids: 16-Methylene steroids. Vanrheenen, Verlan H. (Upjohn Co. , USA). U.S. US 4416821 A 22 Nov 1983, 8 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07J007-00.Several substances with their cas registry numbers 89330-49-4 and 28319-72-4 may be metioned in this study. NCL: 260397100. APPLICATION: US 82-349490 17 Feb 1982. DOCUMENT TYPE: Patent CA Section: 32 (Steroids) Methyleneandrostenones I, II, and III (R = H, F, Me; R1 = H, F; Z = O; H2; H, HO) and their 4,6-unsatd. analogs were prepd. by treating acyl steroids IV (R2 = H, CF3, cyano, alkoxycarbonyl) with HCHO. Thus, condensation of androsta-1,4,9(11)-triene-3,17-dione with MeO2CCO2Me in MeOH contg. NaOMe gave 16-(methoxyoxoacetyl)androsta-1,4,9(11)-triene-3,17-dione, which was treated with paraformaldehyde in THF-Et3N contg. NaHCO3 to give II (R = H). .