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.
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