Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA901565A
Inventor
J. Marshall David
Raman Pattabi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth LLC
Original Assignee
American Home Products Corp
Publication date
Application grantedgrantedCritical
Publication of CA901565ApublicationCriticalpatent/CA901565A/en
PROCESS FOR THE PREPARATION OF 21-CHLORO-6,6 9.alpha.-TRIFLUORO-11.beta.,16.alpha.,17.alpha.-TRIHYDROXY-1,4-PREGNADIEN-3,20-DIONE 16,17-KETALS AND SELECTED INTERMEDIATES