Tandem Allylboration-Prins Reaction for the Rapid Construction of Substituted Tetrahydropyrans: Application to the Total Synthesis of (−)-Clavosolide A
作者:Alba Millán、James R. Smith、Jack L.-Y. Chen、Varinder K. Aggarwal
DOI:10.1002/anie.201511140
日期:2016.2.12
Tetrahydropyrans are common motifs in natural products and have now been constructed with high stereocontrol through a three-component allylboration-Prins reaction sequence. This methodology has been applied to a concise (13 steps) and efficient (14 % overall yield) synthesis of the macrolide (-)-clavosolide A. The synthesis also features an early stage glycosidation reaction to introduce the xylose
作者:Tushar Kanti Chakraborty、Vakiti Ramkrishna Reddy、Praveen Kumar Gajula
DOI:10.1016/j.tet.2008.03.039
日期:2008.5
For the total synthesis of (-)-clavosolide A described herein, a Schmidt glycosidation reaction was used to attach the sugar moiety at an early stage in the synthesis to the 4-hydroxy group of the substituted tetrahydropyran unit of the molecule, which itself was built following a Ti(III)-mediated method developed by us earlier, and at the end, it was the Yamaguchi reaction that was successfully employed for the cyclodimerization of the two halves of the molecule leading to its total synthesis. (c) 2008 Elsevier Ltd. All rights reserved.