Five-Membered Cyclic Nitronates in C-C Coupling with 1-(<i>tert</i>-Butyldimethylsilyloxy)-1-methoxyethylene
作者:Vladimir O. Smirnov、Alexander S. Sidorenkov、Yulia A. Khomutova、Sema L. Ioffe、Vladimir A. Tartakovsky
DOI:10.1002/ejoc.200900172
日期:2009.6
Five-memberedcyclicnitronates 3 undergo TBSOTf-catalysed C–Ccoupling reactions with silyl ketene acetal 4 to give good to excellent yields of 3,3-disubstituted N-(OTBS)-isoxazolidines 5, which could not be obtained by previously known procedures. The problems of diastereoselectivity of the C–Ccoupling reactions are discussed. The transformations of the nitroso acetals 5 upon action of AcFOH/methanol