(Z)-3-(2-{2-[1-[1-Cyano-meth-(Z)-ylidene]-2-ethyl-2-(tetrahydro-pyran-2-yloxy)-butylamino]-ethyldisulfanyl}-ethylamino)-4-ethyl-4-(tetrahydro-pyran-2-yloxy)-hex-2-enenitrile 在
氧气 、
sodium ethanolate 作用下,
以
乙醇 为溶剂,
以58%的产率得到3-[1-Ethyl-1-(tetrahydro-pyran-2-yloxy)-propyl]-5,6-dihydro-4H-[1,4]thiazine-2-carbonitrile