Pd(II)-mediated synthesis of 2-deoxy- and rare-C-glycosides
摘要:
The synthesis of 2-deoxy-C-glycosides and rare-C-saccharides from the gamma,delta -olefinic alcohols is described. In the presence of Pd(II) reagents these olefinic alcohols undergo an efficient intramolecular oxidative cyclisation to afford the target molecules. (C) 2001 Elsevier Science Ltd. All rights reserved.
Facile access to some chiral building blocks. Synthesis of verbalactone and exophilin A
摘要:
D-Glucono-1,5-lactone, all inexpensive carbohydrate, was elaborated into chiral building blocks readily applicable in synthesis via practical routes without involving any expensive reagents or tedious operations. Application Of Such chiral building blocks in total synthesis is then exemplified through construction of verbalactone and exophilin A. The latter compound has not been synthesized to date. (C) 2008 Elsevier Ltd. All rights reserved.
Highly Stereocontrolled Synthesis of <i>trans</i>-2,6-Disubstituted-5-methyl-3,6-dihydropyrans: Stereoselective Synthesis of the Bicyclic Core of Penostatin B
作者:D. Srinivas Reddy、Birakishore Padhi、Debendra K. Mohapatra
DOI:10.1021/jo502101u
日期:2015.2.6
An efficient, mild, and highlydiastereoselective strategy for the synthesis of trans-2,6-disubstituted-5-methyl-3,6-dihydropyran ring systems has been developed starting from δ-hydroxy α-methyl α,β-unsaturated aldehydes and allyltrimethylsilane in the presence of a catalytic amount of ZnBr2 in a highlydiastereoselective manner with excellent yield. The versatility of the above method was also demonstrated