Synthesis of C-glycopyranosyl compounds by a palladium-catalyzed coupling reaction of 1-tributylstannyl-d-glucals with organic halides
作者:Eric Dubois、Jean-Marie Beau
DOI:10.1016/s0008-6215(00)90552-4
日期:1992.4
1-Tributylstannyl-D-glucals, prepared from the corresponding 1-phenylsulfonyl-D-glucals, were coupled efficiently to various organic halides in the presence of a palladium(0) catalyst. This mild reaction is specially useful for the preparation of 1-C-aryl-D-glucals and compatible with unprotected hydroxy groups or hindered aromatic bromides. It has been shown that the resulting 1-C-aryl(alkyl)-D-glucals
由相应的1-苯基磺酰基-D-葡萄糖制备的1-三丁基锡烷基-D-葡萄糖在钯(0)催化剂的存在下有效地偶联到各种有机卤化物上。这种温和的反应对于制备1-C-芳基-D-葡萄糖特别有用,并且与未保护的羟基或受阻的芳香族溴化物相容。已经表明,所得的1-C-芳基(烷基)-D-葡萄糖适用于烯醇醚基团的进一步合成操作,包括立体选择性氢化,硼氢化-氧化或环氧化。所有形成的化合物都是由试剂对葡糖衍生物的α-面的攻击所致。反应扩展到1,3-,1,4-二-和1,3,5-三溴苯,导致相应的对称的二-(三)-C-葡萄糖基苯。最后,顺序的二-C-葡萄糖基化为1