Highly stereospecific conversion of C-centrochirality of a 3,4-dihydro-2H-1,1′-binaphthalen-1-ol into axial chirality of a 3,4-dihydro-1,1′-binaphthalene
作者:Tetsutaro Hattori、Masamitsu Date、Kenta Sakurai、Naoya Morohashi、Hiroshi Kosugi、Sotaro Miyano
DOI:10.1016/s0040-4039(01)01708-7
日期:2001.11
ytterbium reagent to 2-methyl-1-tetralone (R)-1b, was stereospecifically converted into axial chirality of 3,4-dihydro-2′-methoxy-2-methyl-1,1′-binaphthalene (aR)-4 with up to 95% ee by dehydration with trifluoroacetic anhydride. DDQ aromatization of (aR)-4 gave 2′-methoxy-2-methyl-1,1′-binaphthalene (aR)-5 without appreciable loss of the axial integrity. The net process provides a potential access
Ç 3,4-二氢-2'-甲氧基-2-甲基-2 -Centrochirality ħ -1,1'-联萘-1-醇([R ,- [R - )3E,其已经通过把非对映选择性,1,2-在2-甲基-1-四氢萘酮(R)-1b中添加2-甲氧基-1-萘基ly试剂被立体定向转化为3,4-二氢-2'-甲氧基-2-甲基-1,1的轴向手性通过用三氟乙酸酐脱水可得到ee高达95%的′-联萘(a R)-4。(a R)-4的DDQ芳构化得到2'-甲氧基-2-甲基-1,1'-联萘(a R)-5不会明显损失轴向完整性。净过程提供了非外消旋的1,1'-双萘的潜在途径。