An efficient method for the allylation of aldehydes containing a broad range of functional groups using potassium allyltrifluoroborate is described. The reaction utilizes a catalytic amount of 18-C-6 in biphasic media under open atmosphere and room temperature to provide the corresponding homoallylic alcohols in high yields and without the necessity of any subsequent purification.
Synthesis of the C7–C24 fragment of (−)-Macrolactin F
作者:Roberta A. Oliveira、Juliana M. Oliveira、Luis H.S. Rahmeier、Joao V. Comasseto、Joseph P. Marino、Paulo H. Menezes
DOI:10.1016/j.tetlet.2008.07.113
日期:2008.9
An enantioselective and convergent synthesis of the C7–C24 fragment of Macrolactin F was achieved from four main fragments. A hydrotelluration/transmetalation sequence was used to install the E,Z diene present in the molecule, while a hydrozirconation/transmetalation sequence was used to connect two advanced intermediates.