作者:Zheng, Yao、Du, Da-Ming
DOI:10.3390/molecules29132958
日期:——
efficient and practical organocatalyzed asymmetric Mannich/cyclization tandem reaction strategy of 2-benzothiazolimines and 2-isothiocyanato-1-indanones was developed, and novel spirocyclic compounds containing benzothiazolimine and indanone scaffolds were obtained. This chiral thiourea-catalyzed Mannich/cyclization tandem reaction offers chiral spirocyclic compounds with continuous tertiary and quaternary
开发了一种高效实用的2-苯并噻唑胺和2-异硫氰酸-1-茚满酮的有机催化不对称曼尼希/环化串联反应策略,并获得了含有苯并噻唑胺和茚满酮支架的新型螺环化合物。这种手性硫脲催化的曼尼希/环化串联反应可提供具有连续三级和四级立构中心的手性螺环化合物,产率良好至高(高达 90%),具有优异的非对映选择性(高达 >20:1 dr)和对映选择性(高达 98%) ee)在-18°C。此外,还进行了放大合成,并保留了产率和立体选择性,并提出了反应机理。