CuBr<sub>2</sub>-catalyzed diastereoselective allylation: total synthesis of decytospolides A and B and their C6-epimers
作者:Birakishore Padhi、G. Sudhakar Reddy、N. Arjunreddy Mallampudi、Utkal Mani Choudhury、Debendra K. Mohapatra
DOI:10.1039/c9ob02689d
日期:——
CuBr2-catalyzed diastereoselective allylation of a cyclic hemiacetal with allyltrimethylsilane as a nucleophile has been developed. The protocol offers a cost effective, protecting group tolerant, and operationally simple approach to 2,6-trans-disubstituted tetrahydropyran with excellent diastereoselectivity. Furthermore, the application of this methodology has been demonstrated in the totalsynthesis of decytospolides
Novel iodine catalyzed diastereoselective synthesis of trans-2,6-disubstituted tetrahydro-2H-pyrans: synthesis of C1–C13 fragment of bistramide-A
作者:Jhillu Singh Yadav、Eppa Gyanchander、Anand Kumar Mishra、Peddapuram Adithya、Saibal Das
DOI:10.1016/j.tetlet.2013.08.085
日期:2013.10
A new method for the stereoselective synthesis of trans 2.6-disubstituted tetrahydro-2H-pyrans has been developed involving iodine catalyzed allylation of tetrahydro-2H-pyranol with excellent trans selectivity. The method was also applied toward the construction of C1-C13 fragment of bistramide-A in 11 steps with 21.4% overall yield. (C) 2013 Elsevier Ltd. All rights reserved.