Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of...Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of α methylene 3 pentanone(4) with silylenol ether(2). In the presence of chiral reagent 6 β phenyl amino 3 β,5α chlorestandiol(7), compound (5) was reduced by KBH 4 directly to give Tobacco Beetle Pheromone (7S) (-) 4,6 dimethyl 7 hydroxyl 3 nonanone(6). 25 D=-35 87°( c =0 23, CHCl 3), overall yield 23 9%.展开更多
The preparation of peroxodisulfated zirconia titania(PSZT) solid super acid has been investigated as function of molar ratio of Ti to Zr, impregnation time, calcination time and temperature in esterification of maleic...The preparation of peroxodisulfated zirconia titania(PSZT) solid super acid has been investigated as function of molar ratio of Ti to Zr, impregnation time, calcination time and temperature in esterification of maleic anhydride with n octanol. The highest yield of dioctyl maleate was 98 2% at the optimum reaction conditions.展开更多
文摘Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of α methylene 3 pentanone(4) with silylenol ether(2). In the presence of chiral reagent 6 β phenyl amino 3 β,5α chlorestandiol(7), compound (5) was reduced by KBH 4 directly to give Tobacco Beetle Pheromone (7S) (-) 4,6 dimethyl 7 hydroxyl 3 nonanone(6). 25 D=-35 87°( c =0 23, CHCl 3), overall yield 23 9%.
文摘The preparation of peroxodisulfated zirconia titania(PSZT) solid super acid has been investigated as function of molar ratio of Ti to Zr, impregnation time, calcination time and temperature in esterification of maleic anhydride with n octanol. The highest yield of dioctyl maleate was 98 2% at the optimum reaction conditions.