An efficient stereoconvergent synthesis of the 4-ethylamino-2,4-dideoxy-l-threo-pentopyranose component of the calicheamicins and esperamicins
作者:Eugene A. Mash、Sandeep K. Nimkar
DOI:10.1016/0040-4039(93)85082-8
日期:1993.1
A stereconvergent synthesis of the 4-ethylamino-2,4-dideoxy-L-threo-pentopyranose coonponent of calicheamicins γ1, γ1I, α2I, and esperamicin A1b from methyl 2-deoxy-β-D-ribopyranoside is described. The synthesis requires eight steps in each branch. The overall yield is 54%. This synthesis should be adaptable for syntheses of the corresponding 4-methylamino)-2,4-dideoxy- L-threo- and 4-isopropylamino-2
的stereconvergent合成4-乙基氨基-2,4-二脱氧L-苏-pentopyranose coonponent刺孢霉素γ的1,γ 1我,α 2予,和埃斯波甲1b中由2-脱氧- β-d-ribopyranoside是描述。该综合在每个分支中需要八个步骤。总产率为54%。该合成应适合于合成其他加利车霉素和艾司帕米霉素抗生素的相应的4-甲基氨基)-2,4-二脱氧-L-苏-和4-异丙基氨基-2.4-双脱氧-L-苏-戊糖成分。