George G. Wu - Basking Ridge NJ Xing Chen - Plainsboro NJ Doris P. Schumacher - Bedminster NJ Martin Steinman - Livingston NJ
Assignee:
Schering Corporation - Kenilworth NJ
International Classification:
C07D20508
US Classification:
540200
Abstract:
The invention relates to intermediates of the formulae ##STR1## said intermediates being useful in a process for producing a compound of the formula ##STR2## wherein Bn is benzyl and R. sub. 1,. sub. 2 and R. sub. 3 are as defined in the specification,.