9-oxo-8-oxabicyclo[5,3,0]dec-6-ene-1-carboxylate. Reduction of the latter with lithium hydridotri-t-butoxyaluminate in tetrahydrofuran affords a mixture of ethyl endo- and ethyl exo-hydroxy-9-oxobicyclo[4,2,1]nonane-1-carboxylates, in which the endo-compound predominates. These products are thought to be formed by way of 1-ethoxycarbonyl-2-oxocycloheptaneacetaldehyde.
1-乙氧羰基-2-氧代
环庚烷乙酸与
萘-2-磺酸在沸腾的二
甲苯中反应,生成8-氧杂双环[5,3,0] dec-1(10)-en-9-one,主要是乙基9-氧代8-氧杂双环[5,3,0] dec-6-烯-1-
羧酸酯。在
四氢呋喃中用氢化三叔丁氧基铝酸
锂还原后者,得到乙基内-和乙基外-羟基-9-氧代双环[4,2,1]
壬烷-1-
羧酸盐的混合物,其中内化合物占主导地位。这些产物被认为是通过1-乙氧基羰基-2-氧代
环庚烷乙醛形成的。