Stereoselective synthesis of spirocyclic derivatives of functionalized 2,3,4,7-tetrahydro-1H-azepines
作者:Ildar R. Iusupov、Alexander V. Kurkin
DOI:10.1016/j.mencom.2024.02.016
日期:2024.3
A simple and effective stereoselective synthesis of unique azaspirocyclic 2,3,4,7-tetrahydro-1-azepine derivatives, namely, 7-azaspiro[4.6]undec-9-ene and 8-azaspiro[5.6]- dodec-10-ene, from simple commercially available reagents was accomplished. Their key 1,2-epoxy derivatives as individual diastereomers were obtained in nine steps with 31–32% overall yields. The possibility of synthesizing a library
简单有效的立体选择性合成独特的氮杂螺环2,3,4,7-四氢-1-氮杂环庚烷衍生物,即7-氮杂螺[4.6]undec-9-ene和8-氮杂螺[5.6]-dodec-10-ene ,由简单的市售试剂完成。他们的关键 1,2-环氧衍生物作为单独的非对映异构体通过九个步骤获得,总产率为 31-32%。通过简单的化学修饰,-Boc 保护的 (1,2,6)-1,2-epoxy-8-aza-spiro[5.6]dodec-10-ene 支架证明了合成小螺杂环分子库的可能性其环氧化物功能。