Abstract
An efficient stereoselective preparation of HIV protease inhibitor (+)- 1 was synthesized on multi-kilogram scale in 16 steps without the use of chromatography. The key steps include the diastereoselective alkylation of acetal 3, a diastereoselective iodo-hydroxylation to generate epoxide 6, and a reductive amination in the final coupling step that averts a non-productive cyclic aminal intermediate.
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