A Synthetic Pathway to the 1,4-Dihydro-2H-3-benzoxocine System from Morita–Baylis–Hillman Cinnamyl Alcohols with 2,5-Dimethoxy-2,5-dihydrofuran via the Heck Reaction
作者:Kee-Jung Lee、Sang-Hyun Ahn、Young Kim、Jina Hyun
DOI:10.1055/s-0032-1317471
日期:——
arbonylmethyl)-1,4-dihydro-2H-3-benzoxocine-5-carboxylates were converted into methyl 2-oxo-1,2,5,11b-tetrahydro-3aH-furo[3,2-a][3]benzoxocine-6-carboxylates on exposure to excess trifluoroacetic acid. A new synthetic method for methyl 2-methoxy-1-(methoxycarbonylmethyl)-1,4-dihydro-2H-3-benzoxocine-5-carboxylates was developed using the Heck reaction between 2,5-dimethoxy-2,5-dihydrofuran and methyl
摘要 利用2,5-二甲氧基-2,5-二氢呋喃之间的Heck反应,开发了一种新的2-甲氧基-1-(甲氧羰基甲基)-1,4-二氢-2 H -3-苯并氧辛-5-羧酸甲酯的合成方法和2-(羟甲基)-3-(2-碘苯基)丙烯酸甲酯是关键步骤。后者可通过碘化苯甲醛与乙酰甲基丙烯酸甲酯的乙酰化,重排和水解反应,从Morita-Baylis-Hillman反应中轻松获得。将2-甲氧基-1-(甲氧基羰基甲基)-1,4-二氢-2 H -3-苯并氧杂-5-羧酸酯转化为甲基2-氧代-1,2,5,11b-四氢-3a H-呋喃暴露于过量的三氟乙酸中,[3,2- a ] [3]苯并oc辛-6-羧酸盐。 利用2,5-二甲氧基-2,5-二氢呋喃之间的Heck反应,开发了一种新的2-甲氧基-1-(甲氧羰基甲基)-1,4-二氢-2 H -3-苯并氧辛-5-羧酸甲酯的合成方法和2-(羟甲基)-3-(2-碘苯基)丙烯酸甲酯是关键步骤