Total synthesis of a second generation HIV protease inhibitor
摘要:
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. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis of 5-Pyridyl-2-furaldehydes via Palladium-Catalyzed Cross-Coupling with Triorganozincates
作者:Donald R. Gauthier,、Ronald H. Szumigala、Peter G. Dormer、Joseph D. Armstrong、R. P. Volante、Paul J. Reider
DOI:10.1021/ol0170612
日期:2002.2.1
[GRAPHICS]-Pyridyl- and 5-aryl-2-furaidehydes are prepared from furaldehyde diethyl acetal in a four-step, one-pot procedure: (1) deprotonation; (2) U to Zn transmetalation; (3) Pd-medlated cross-coupling; (4) aldehyde deprotection. Triorganozincate 7 was found to transfer all three groups in the Pd-catalyzed cross-coupling reaction with haloaromatics.
GAMMA-HYDROXY-2-(FLUOROALKYLAMINOCARBONYL)-1-PIPERAZINEPENTANAMIDES AS HIV PROTEASE INHIBITORS