Synthesis 2015; 47(05): 712-720
DOI: 10.1055/s-0034-1379641
paper
© Georg Thieme Verlag Stuttgart · New York

A Concise and Efficient Synthesis of Substituted Morpholines

Sundeep Dugar
a   Sphaera Pharma Pte. Ltd., 8 Temasek Boulevard, #22-03 Suntec Tower, 038988, Singapore
,
Amit Sharma
b   Sphaera Pharma Pvt. Ltd., Plot No 32, Sector 5, IMT Manesar 122051, India   Email: dinesh.m@sphaerapharma.com
,
Bilash Kuila
b   Sphaera Pharma Pvt. Ltd., Plot No 32, Sector 5, IMT Manesar 122051, India   Email: dinesh.m@sphaerapharma.com
,
Dinesh Mahajan*
b   Sphaera Pharma Pvt. Ltd., Plot No 32, Sector 5, IMT Manesar 122051, India   Email: dinesh.m@sphaerapharma.com
,
Sandeep Dwivedi
b   Sphaera Pharma Pvt. Ltd., Plot No 32, Sector 5, IMT Manesar 122051, India   Email: dinesh.m@sphaerapharma.com
,
Vinayak Tripathi
b   Sphaera Pharma Pvt. Ltd., Plot No 32, Sector 5, IMT Manesar 122051, India   Email: dinesh.m@sphaerapharma.com
› Author Affiliations
Further Information

Publication History

Received: 19 September 2014

Accepted after revision: 17 November 2014

Publication Date:
23 December 2014 (online)


Abstract

A simple and efficient method has been developed for the synthesis of substituted morpholines by a sequence of coupling, cyclization, and reduction reactions of easily available amino alcohols and α-halo acid chlorides. Various mono-, di-, and trisubstituted morpholines, spiro morpholines, and ring-fused morpholines, as well as morpholine homologues, were synthesized in good to excellent yields by a single methodology under similar reaction conditions. The method was also used in a multigram synthesis of (3S)-3-methylmorpholine.

Supporting Information