The Diels–Alder reactions of alkylhalovinylboranes have been investigated theoretically and experimentally. Alkylhalovinylboranes presented higher reactivity than the corresponding dialkylvinylboranes. Although endo/exo selectivities were high for the reactions with cyclopentadiene, facial selectivities for the chiral analogues were low. Our results demonstrate that the replacement of an alkyl group
烷基卤
乙烯基硼烷的 Diels-Alder 反应已在理论上和实验上进行了研究。烷基卤代
乙烯基硼烷比相应的二烷基
乙烯基硼烷具有更高的反应性。尽管与
环戊二烯反应的内/外选择性很高,但手性类似物的面部选择性却很低。我们的结果表明,
硼原子上的烷基被卤素取代会显着增加亲二烯性。