Regioselectivity of Rhodium Nitrene Insertion. Syntheses of Protected Glycals of <scp>l</scp>-Daunosamine, <scp>d</scp>-Saccharosamine, and <scp>l</scp>-Ristosamine
作者:Kathlyn A. Parker、Wonsuk Chang
DOI:10.1021/ol050356l
日期:2005.4.1
[reaction: see text] The carbamate-protected glycals of naturally occurring 3,4-cis-3-amino-2,3,6-trideoxyhexoses (l-daunosamine, d-saccharosamine, and l-ristosamine) were prepared from noncarbohydrate starting materials. The short, high-yield syntheses are based on the chemoselective insertion of a rhodium nitrene in an allylic C-H bond rather than in a C-H bond that is alpha to an oxygen substituent