(R)-2,3-Cyclohexylideneglyceraldehyde: A versatile intermediate for sugar modified dideoxynucleosides
摘要:
(R)-2,3-Cyclohexylideneglyceraldeyde 1 has been found to be a useful intermediate for the convenient synthesis of both threo- and erythro- forms of functionally rich 2-deoxypentofuranoses, possible precursors of sugar modified 2',3'-dideoxynucleosides. This has been exemplified by the exploitation of its major allylation product 2b for a short synthesis of 4 and 8 and subsequent transformation of 8 to threo 3-azido-2,3-dideoxy-pentofuranose 9. (C) 1997 Elsevier Science Ltd.
A highly stereoselective total synthesis of (+)-(8R,8aR)-perhydro-8-indolizidinol is described. Key steps involved in this synthesis are diastereoselective zinc allylation, azido-olefin cyclization and reductive amination followed by cyclization which effectively constructed the indolizidine ring. This contributes a unique approach to the synthesis of indolizidinealkaloids that offers the advantages
(R)-2,3-Cyclohexylideneglyceraldehyde: A versatile intermediate for sugar modified dideoxynucleosides
作者:Angshuman Chattopadhyay
DOI:10.1016/s0957-4166(97)00325-x
日期:1997.8
(R)-2,3-Cyclohexylideneglyceraldeyde 1 has been found to be a useful intermediate for the convenient synthesis of both threo- and erythro- forms of functionally rich 2-deoxypentofuranoses, possible precursors of sugar modified 2',3'-dideoxynucleosides. This has been exemplified by the exploitation of its major allylation product 2b for a short synthesis of 4 and 8 and subsequent transformation of 8 to threo 3-azido-2,3-dideoxy-pentofuranose 9. (C) 1997 Elsevier Science Ltd.