Patents Assigned to Labochim Laboratorio Chimico Internazionale S.p.A. - Justia Patents Search

Patents Assigned to Labochim Laboratorio Chimico Internazionale S.p.A.

Isocyanate process for the preparation of 1,3A,8-trimethyl-1,2,3,3A, 8, 8A-hexahydro-pyrrole ?2,3-B! indol-5 (3AS, 8AR) -hepthylcarbamate

Patent number: 5705657

Abstract: A process for the preparation of 1,3a,8-trimethyl-1,2,3,3a,8,8a-hexahydro-pyrrole?2,3-b!indol-5(3aS,8aR)-he ptylcarbamate, of formula (I) ##STR1## by reacting eseroline with heptylisocyanate in the presence of a metal cyanate and of a quaternary ammonium salt, in polar aprotic solvents.

Type: Grant

Filed: April 4, 1995

Date of Patent: January 6, 1998

Assignee: Labochim Laboratorio Chimico Internazionale S.p.A.

Inventors: Stefano Maiorana, Anna Bonura, Giorgio Chiodini