Synthesis of the enantiopure C15–C26 segment of phorboxazole A and B
摘要:
Two approaches towards an enantiopure C15-C26 segment of the phorboxazoles starting from the corresponding C20-C26 aldehyde are presented. A variety of functionalized oxazoles have been synthesized via the rhodium(II) acetate catalyzed cycloaddition of dimethyl diazomalonate to substituted nitriles. (C) 1999 Elsevier Science Ltd. All rights reserved.
Synthesis of the enantiopure C15–C26 segment of phorboxazole A and B
作者:Peter Wolbers、Andrea M. Misske、H. Martin R.%Hoffinann
DOI:10.1016/s0040-4039(99)00803-5
日期:1999.6
Two approaches towards an enantiopure C15-C26 segment of the phorboxazoles starting from the corresponding C20-C26 aldehyde are presented. A variety of functionalized oxazoles have been synthesized via the rhodium(II) acetate catalyzed cycloaddition of dimethyl diazomalonate to substituted nitriles. (C) 1999 Elsevier Science Ltd. All rights reserved.
Asymmetric synthesis of seven-carbon segments of the phorboxazoles and (−)-discodermolide: Complementary route from racemic trans-2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one
作者:Andrea M Misske、H.M.R Hoffmann
DOI:10.1016/s0040-4020(99)00127-1
日期:1999.4
The C20–C26 segment of the phorboxazoles A and B and the C1–C7 segment of (−)-discodermolide were synthesized in excellent chemical and optical yield using trans-2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one rac-1 with four stereogenic centres and three prostereogenic sp2-sites as an early racemic switch.