. Author manuscript; available in PMC: 2009 May 5.

Published in final edited form as: Tetrahedron Lett. 2008 May 5;49(19):3162–3164. doi: 10.1016/j.tetlet.2008.03.011

Table 1.

Preparation of representative α-diazo-β-ketoesters

entry	aldehyde substrate	α-diazo-β-hydroxyester 3	α-diazo-β-ketoester 4

*∼12 equiv pyridine added to reaction mixture