Synthesis of β-Amino-Substituted Enones by Addition of Substituted Methyl Enones to Sulfinimines: Application to the Total Synthesis of Alkaloids (+)-Lasubine II and (+)-241D and the Formal Total Synthesis of (−)-Lasubine I
作者:Arava Amaranadha Reddy、Polimera Obula Reddy、Kavirayani R. Prasad
DOI:10.1021/acs.joc.6b01541
日期:2016.11.18
Addition of silyl enol ethers obtained from substituted methyl enones to chiral sulfinimines afforded the β-amino-substituted enones with excellent selectivity. Utility of the obtained N-sulfinyl β-amino ketones possessing α,β-unsaturation is exemplified in the total synthesis of the quinolizidine alkaloid natural products (−)-lasubine I, (+)-lasubine II, and substituted piperidine alkaloid (+)-241-D
将由取代的甲基烯酮得到的甲硅烷基烯醇醚加到手性亚磺胺上,得到具有优异选择性的β-氨基取代的烯酮。在喹唑烷生物碱天然产物(-)-lasubine I,(+)-lasubine II和取代的哌啶生物碱(+)的总合成中,举例说明了获得的具有α,β-不饱和度的N-亚磺酰基β-氨基酮的用途。 -241-D。