Unusual Knoevenagel condensations of 16a-substituted-16-methylene-17-keto-steroids

Pettit, 1970, J. Org. Chem., 35, 1367, 10.1021/jo00830a025 Ode, 1972, 8 Nambara, 1968, Chem. Pharm. Bull. Tokyo, 16, 2236, 10.1248/cpb.16.2236 Ketcheson, 1960, Can. J. Chem., 38, 972, 10.1139/v60-135 Fajkos, 1953, Chem. Listy, 47, 712 Bertin, 1962, Bull. Soc. Chim. Fra., 1555 Gerali, 1969, Farmaco, Ed. Sci., 24, 221 Reid, 1973, Ann. Chem., 134, 10.1002/jlac.197319730119 Sakurai, 1972, J. Org. Chem., 37, 1523, 10.1021/jo00975a013 Campaigne, 1975, J. Hetero. Chem., 12, 267, 10.1002/jhet.5570120211 Latif, 1970, Chem. & Ind., 1539 Ducker, 1975, Austr. J. Chem., 28, 581, 10.1071/CH9750581 Uno, 1961, Bull. Chem. Soc. Japan, 34, 545, 10.1246/bcsj.34.545 Boar, 1975, J. Chem. Soc., 1242 McDonald, 1973, J. Chem. Soc., 605 Duffield, 1965, J. Am. Chem. Soc., 87, 2913, 10.1021/ja01091a022 Zacharias, 1974, Monatsh für Chemie, 105, 1283, 10.1007/BF00909865 Taylor, 1959, J. Am. Chem. Soc., 81, 2452, 10.1021/ja01519a044 Grob, 1967, Angew. Chem. Int., 16, 1, 10.1002/anie.196700011 Ruzicka, 1948, Helv. Chim. Acta, 31, 1296, 10.1002/hlca.19480310515