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2747240 
Technical Report 
Heterocyclic steroids. Simple route to 8-aza-11-oxasteroids and 8-aza-11-oxa-D-homosteroids 
Carotti, A 
1981 
IPA/83/532345 
Sci 
REF 20 
146-151 
IPA COPYRIGHT: ASHP A one step conversion of aldol adducts from cyclic 1,2,3-tricarbonyl compounds with 1,3-cyclopentanedione and 1,3-cyclohexanedione into 12-spiro derivatives of 8-aza-11-oxa-17-oxo-gona-1,3,5(10)6,13-pentaene and of 8-aza-11-oxa-17-oxo-D-homo-gona-1,3,5(10)6,13-pentaene, respectively, was described.