Improved preparation of (1S,3′R,4′S,5′S,6′R)-5-chloro-6-[(4-ethylphenyl)methyl]-3′,4′,5′,6′-tetrahydro-6′-(hydroxymethyl)-spiro[isobenzofuran-1(3H),2′-[2H]pyran]-3′,4′,5′-triol
作者:Yong-Hai Liu、Ting-Ming Fu、Chun-Yan Ou、Wen-Ling Fan、Guo-Ping Peng
DOI:10.1016/j.cclet.2013.01.013
日期:2013.2
convenient approach for the preparation of (1S,3′R,4′S,5′S,6′R)-5-chloro-6-[(4-ethylphenyl)methyl]-3′,4′,5′,6′-tetrahydro-6′-(hydroxymethyl)-spiro[isobenzofuran-1(3H), 2′-[2H]pyran]-3′,4′,5′-triol is developed. The targeted compound was synthesized from 2-bromo-4-methylbenzoic acid in nine steps and the isomers of undesired ortho-products were avoided during the preparation.
一种方便的制备(1S,3'R,4'S,5'S,6'R)-5-氯-6-[(4-乙基苯基)甲基] -3',4',5'的方法研发了6,-四氢-6'-(羟甲基)-螺[异苯并呋喃-1(3 H),2'-[2 H ]吡喃] -3',4',5'-三醇。由2-溴-4-甲基苯甲酸分九步合成目标化合物,在制备过程中避免了不需要的邻位产物的异构体。