Journal of Organic Chemistry p. 1494 - 1500 (1982)
Update date:2022-09-26
Topics:
Garst, Michael E.
Bonfiglio, John N
Marks, Jeffrey
The hydroboration-carbon monoxide insertion of several bis-olefinic derivatives has provided facile preparations of N-(carbomethoxy)-5-azacyclooctanone (6), N-(carbobenzyloxy)-5-azacyclooctanone (9), and N-(carbobenzyloxy)-5-cyclononanone (18).Of the hydroboration protocols examined, thexylborane-cyanidation proved to be the most useful.Reductive ring closure of 9 and of 18 gave 26 and 27, respectively.Methylation of 9 followed by reduction afforded 29 and 30.
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