11-lower-alkoxy-and lower-alkylthio-3-oxo-lower-alkyl-...

Details 11-lower-alkoxy-and lower-alkylthio-3-oxo-lower-alkyl-... 11-lower-alkoxy-and lower-alkylthio-3-oxo-lower-alkyl-...

C - Chemistry, Metallurgy

07

D

260/237.85

C07D 225/04 (2006.01)

Patent

CA 1128934

A B S T R A C T A process for preparing a compound having the formula: Image ...I where R1 is hydrogen, lower-alkyl, cyclo-alkyl-lower-alkyl, phenyl-lower-alkyl, lower-alkenyl or lower-alkynyl; three of R2, R2', R2" and R2''' are hydrogen and the fourth is hydroxy, R3 and R4 are each hydrogen or lower-alkyl or R3 and R4 to- gether are divalent lower-alkylene, -(CH2)?, where m is one of the integers 3 and 4; and Alk is lower-alkyl, which com- prises reacting a compound having the formula: Image ...II where three of R2, R2', R2" and R2''' are hydrogen and the fourth is lower-alkoxy, and R1, R3 and R4 have the meanings given above, with an alkali metal lower-alkanethiol salt.

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