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Selective formation and trapping of dihalocarbonyl ylides derived from dihalocarbenes and substituted benzaldehydes

✍ Scribed by Gill, Harpal S.; Landgrebe, John A.

Book ID
127198631
Publisher
American Chemical Society
Year
1983
Tongue
English
Weight
725 KB
Volume
48
Category
Article
ISSN
0022-3263

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Amino diazoacetoacetates 4a-e and 7a,b were prepared from readily available amino alcohols and subjected to copper-catalyzed carbene-transfer reaction. Substrates 4c-e furnished the morpholin-2-ones 5c-e in good yield via the corresponding cyclic ammonium ylides, albeit with poor diastereoselectivit