T. Kumagai et al., A FACILE SYNTHESIS OF MERCAPTOPYRAZOLIDINE USEFUL FOR CONSTRUCTION OFTHE PENDANT MOIETY OF 1-BETA-METHYL-CARBAPENEM L-627, Heterocycles, 37(3), 1994, pp. 1521-1527
A 4-mercaptopyrazolidine derivative (3), which is a synthetic intermed
iate of the pendant moiety of 1beta-methylcarbapenem L-627 (2), was sy
nthesized by a practical method starting from hydrazine hydrate.