191283-02-0Relevant articles and documents
Synthesis of (7S,15S)- and (7R,15S)-dolatrienoic acid
Duffield, Jonathan J.,Pettit, George R.
, p. 472 - 479 (2007/10/03)
The stereospecific synthesis of (7S,15S)- and (7R,15S)-dolatrienoic acids (2) was achieved using an approach consisting of 16 linear steps. The C-11-C-16 unit was prepared in seven steps from ethyl (S)lactate and coupled using a trans-selective Wittig - Schlosser reaction to the C-7-C-10 fragment. Chirality at the C-7 position was introduced using an Evan's-type chiral auxiliary in a cobalt-mediated Reformatsky reaction to give the (3S,11S)-aldehyde 24. Subsequent Wittig reaction with a phosphonium salt derived in three steps from tiglic acid gave (7S,15S)-dolatrienoic acid, one of the four possible diastereoisomers of the nonpeptide portion of the strong Cancer cell growth inhibitory cyclodepsipeptide dolastatin 14 (1). A second diastereoisomer, (7R,15S)-dolatrienoic acid, was synthesized employing chiral oxazolidinone 21 by an analogous synthetic route.
Synthesis of 12(S),20-, 12(S),19(R)-, and 12(S),19(S)-dihydroxyeicosa-cis-5,8,14-trans-10-tetraenoic acids, metabolites of 12(S)-HETE
Manna,Viala,Yadagiri,Falck
, p. 2679 - 2682 (2007/10/02)
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