作者:Irina V. Il'ina、Konstantin P. Volcho、Dina V. Korchagina、Georgi E. Salnikov、Alexander M. Genaev、Elena V. Karpova、Nariman F. Salakhutdinov
DOI:10.1002/hlca.201000145
日期:2010.11
The reactions of (+)‐car‐2‐ene (1) and (+)‐car‐3‐ene (2) with aldehydes in the presence of montmorillonite clay were studied for the first time (Schemes 3 and 5). The major products of these reactions are optically active, substituted hexahydroisobenzofurans, probably formed as a result of an attack of the protonated aldehyde at the cyclopropane ring. Quite unexpectedly, the products are cis‐configured
首次研究了(+)-car-2-ene(1)和(+)-car-3-ene(2)在蒙脱石粘土存在下与醛的反应(方案3和5)。这些反应的主要产物是旋光的,取代的六氢异苯并呋喃,可能是由于质子化醛在环丙烷环上的进攻而形成的。出乎意料的是,这些产品在环熔现场进行了顺式配置。事实是通过量子化学计算和NMR数据确定的。看来,在2的行为:3混合物1 / 2在反应中的存在与醛K10 粘土与相应的单个单萜的反应性显着不同。