Unexpected [2+2+2] MIMIRC annulation between a lithium dienolate and methyl acrylate.
摘要:
We describe an unusual [2+2+2] MIMIRC reaction between a lithium dienolate 6 and methyl acrylate. The more classical double Michael addition cyclisation provides an efficient entry towards key intermediate 5 for 2-isocyanopupukeanane 1 synthesis.