Preparation of γ-trimethylsilylallyldibutylstannane grafted on solid support: a clean and easily recyclable reagent for the synthesis of 2,6-disubstituted dihydropyrans
作者:Gaële Fraboulet、Valérie Fargeas、Michaël Paris、Jean-Paul Quintard、Françoise Zammattio
DOI:10.1016/j.tet.2009.03.039
日期:2009.5
annane grafted on an insoluble macroporous polymer is reported. This bimetallic reagent was treated with aldehydes in the presence of indium trichloride to afford in good yields both symmetrical and unsymmetrical cis-2,6-disubstituted dihydropyrans, practically uncontaminated with organotin residues (less than 20 ppm). The potential for regeneration and reuse of this supported bimetallic reagent is
报道了在不溶性大孔聚合物上接枝的γ-三甲基甲硅烷基二丁基烯丙基锡烷的合成。在三氯化铟存在下用醛处理该双金属试剂,以得到良好产率的对称和不对称的顺式-2,6-二取代的二氢吡喃,几乎没有被有机锡残留物污染(小于20ppm)。指出了这种负载的双金属试剂的再生和再利用的潜力。