To stereo-selectively and efficiently obtain the subject optically active compound useful as an intermediate for producing new synthetic quinolone antibacterial agents by reacting a vinylidene halide with a diazo compound in the presence of a specific catalyst.
(B) A compound of the formula: CH2=CXF (X is Cl, Br, I) is reacted with (B) a compound of the formula: N2HCOR [R is a 1-10C alkyloxy (substituted with a halogen), an aralkyloxy comprising a (substituted)aryl and a 1-10C alkyloxy, a (substituted) aryloxy, a (halogenated aryloxy, a (halogenated) 1-10C alkylthio, an aralkylthio comprising a (substituted) aryl and a 1-10C alkylthio, amino, etc.; the substituent of the substituted aryl is a halogen, a 1-10C (halogenated) alkyl, etc.,] to preferentially produce the compound of the formula wherein the steric configuration of the 1-position is the S-configuration.
AKIBA TOSHIFUMI
IKETANI TAKANOBU
WAKITA RYUHEI
SASAKI MIKIO
SUMITOMO CHEMICAL CO
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