Novel synthesis of (d,l) trans-chrysanthemic acid involving a β-diketone fragmentation
摘要:
Methyl (d,l) trans-chrysanthemate as well as its cis-diastereoisomer have been prepared from dimethyl dimedone, one of their isomers, in a few steps and with complete control of the relative stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.
Novel synthesis of (d,l) trans-chrysanthemic acid involving a β-diketone fragmentation
摘要:
Methyl (d,l) trans-chrysanthemate as well as its cis-diastereoisomer have been prepared from dimethyl dimedone, one of their isomers, in a few steps and with complete control of the relative stereochemistry. (C) 2002 Elsevier Science Ltd. All rights reserved.
Cyclopropane cleavage of chrysanthemic acid relatives to santolinyl, artemisyl, and lavandulyl structures: acid-catalysed and biosynthetic experiments
作者:L. Crombie、Patricia A. Firth、R. P. Houghton、D. A. Whiting、D. K. Woods
DOI:10.1039/p19720000642
日期:——
compounds undergo acid-catalysed 1,2-cyclopropane (santolinyl) scission; on the other hand, 2,2-dimethyl-3-(2-methylpropenyl)-cyclopropylmethanol (chrysanthemyl alcohol) and various similar compounds undergo 1,3-(artemisyl) cleavage. Introduction of functional groups into the methylpropenyl side-chain in chrysanthemic-type structures allows acid-catalysedcleavage by a 2,3-(lavandulyl) pathway. Certain