[4 + 2] Cycloaddition reaction of dibenzyl azodicarboxylate and glycals
作者:Yves Leblanc、Brian J. Fitzsimmons、James P. Springer、Joshua Rokach
DOI:10.1021/ja00190a037
日期:1989.4
A convenient synthesis of N-acetyllactosamine derivatives from lactal
作者:Alexander Toepfer、Richard R. Schmidt
DOI:10.1016/0008-6215(93)84249-6
日期:1993.9
O-silyl-protected lactal 1 and bis(2,2,2-trichloroethyl) azodicarboxylate (2), the dihydrooxadiazine derivative 3 was obtained in a very high yield; transesterification with benzyl alcohol furnished the corresponding derivative 4. Treatment of 3 with methanol in the presence of BF3.OEt2 afforded the methyl lactoside derivative 5 which, after transesterification with benzyl alcohol, then hydrogenolytic