Radical-mediated opening of a trisubstituted epoxy alcohol using cp(2)TiCl was followed by diastereoselective reduction of the resulting product with a centrally located methylene group, flanked on both sides by two chiral hydroxyl-bearing carbons, to build all the three chiral centers of (+)-prelactone B 1 in their desired stereochemistries leading to the total synthesis of the molecule. (C) 2003 Elsevier Science Ltd. All rights reserved.
Radical-mediated opening of a trisubstituted epoxy alcohol using cp(2)TiCl was followed by diastereoselective reduction of the resulting product with a centrally located methylene group, flanked on both sides by two chiral hydroxyl-bearing carbons, to build all the three chiral centers of (+)-prelactone B 1 in their desired stereochemistries leading to the total synthesis of the molecule. (C) 2003 Elsevier Science Ltd. All rights reserved.
Progress toward the Total Synthesis of Bafilomycin A<sub>1</sub>: Stereoselective Synthesis of the C15−C25 Subunit by Additions of Nonracemic Allenylzinc Reagents to Aldehydes
作者:James A. Marshall、Nicholas D. Adams
DOI:10.1021/ol006344b
日期:2000.9.1
[reaction: see text] A highly stereoselectivesynthesis of the C15-C25 subunit (2) of bafilomycin A(1) (1) has been accomplished by a route utilizing additions of chiral nonracemic allenylzinc reagents to aldehydes.