A Facile Method for the Preparation of MOM-Protected Carbamates

David M. Barnes*, Jufang Barkalow and Daniel J. Plata
GPRD Process Research and Development, Abbott Laboratories, Building R13/3, 1401 Sheridan Road, North Chicago, Illinois 60064
Org. Lett., 2009, 11 (2), pp 273–275
DOI: 10.1021/ol8022769
Publication Date (Web): December 15, 2008
Copyright © 2008 American Chemical Society

Abstract

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A novel method for the preparation of MOM-protected carbamates is described that avoids the use of MOM-Cl, a regulated carcinogen. The two-step, one-pot procedure generates a reactive N-chloromethyl carbamate that is quenched with methanol to afford MOM-protected carbamates. The process is tolerant of a variety of functionalities, including Boc, sulfonamide, and acetamide protecting groups. Mild conditions for the removal of the MOM group are also described; selective deprotection of the MOM group in the presence of a Boc group has been demonstrated.

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History

  • Published In Issue January 15, 2009
  • Article ASAPDecember 15, 2008
  • Received: September 30, 2008

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