Studies on the total synthesis of the macrolide antitumor agent rhizoxin. 2. Synthesis of the C14C26 segment
摘要:
An asymmetric synthesis of the C14-C26 segment of rhizoxin as described in which the three stereogenic centers are derived from a gamma-lactone; stannylcupration-methylation of a terminal alkyne is used to generate an (E)-iodoalkene for Stille coupling with a dienylstannane that produces the conjugated (E,E,E)-triene unit of rhizoxin. (C) 1997 Elsevier Science Ltd.
Total Synthesis of Rhizoxin D, a Potent Antimitotic Agent from the Fungus <i>Rhizopus chinensi</i>s
作者:James D. White、Paul R. Blakemore、Neal J. Green、E. Bryan Hauser、Mark A. Holoboski、Linda E. Keown、Christine S. Nylund Kolz、Barton W. Phillips
DOI:10.1021/jo020537q
日期:2002.11.1
configuration at C5 of 2 through a stereoselective addition of the radical derived from dehalogenation of 21 at the beta carbon of the (Z)-alpha,beta-unsaturated ester. Aldehyde 29 was obtained from phenylthioacetal 24 and condensed with phosphorane 30, representing subunit B, in a Wittig reaction that gave the (E,E)-dienoate 31. This ester was converted to aldehyde 33 in preparation for coupling with
Studies on the total synthesis of the macrolide antitumor agent rhizoxin. 2. Synthesis of the C14C26 segment
作者:James D. White、Mark A. Holoboski、Neal J. Green
DOI:10.1016/s0040-4039(97)01781-4
日期:1997.10
An asymmetric synthesis of the C14-C26 segment of rhizoxin as described in which the three stereogenic centers are derived from a gamma-lactone; stannylcupration-methylation of a terminal alkyne is used to generate an (E)-iodoalkene for Stille coupling with a dienylstannane that produces the conjugated (E,E,E)-triene unit of rhizoxin. (C) 1997 Elsevier Science Ltd.