作者:R. Balasubramanian、M.V. George
DOI:10.1016/s0040-4020(01)93369-1
日期:1973.1
group in this adduct is in the endo position and that the ester methylene protons are magnetically inequivalent. Similar cycloadditions of hexaphenylsilacyclopentadiene, 1,1-dimethyl-2,3,4,5-tetraphenylsilacyclopentadiene, 1-methyl-1,2,3,4,5-pentaphenylsilacyclopentadiene, and 1-methyl-1-vinyl-2,3,4,5-tetra-phenylsilacyclopentadiene with dienophiles like acrylonitrile, maleic anhydride and dibenzoylacetylene
π 4个S +π 2 s的丙烯酸乙酯hexaphenylsilacyclopentadiene的环加成产生了bicyclosilaheptene衍生物。高分辨率NMR研究表明,该加合物中的酯基位于内部位置和酯亚甲基质子在磁性上是不等价的。六苯基硅碳环戊二烯,1,1-二甲基-2,3,4,5-四苯基硅碳环戊二烯,1-甲基-1,2,3,4,5-五苯基硅碳环戊二烯和1-甲基-1-乙烯基-2,3的类似环加成,已经进行了与亲二烯体如丙烯腈,马来酸酐和二苯甲酰基乙炔的4,5-四苯基硅烷基环戊二烯。这些加合物的立体化学是根据NMR研究推论得出的。已经对某些硅双环庚烯进行了质谱碎裂研究。