(R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone | 169124-55-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone
• 英文别名: (4R)-4-[tert-butyl(dimethyl)silyl]oxy-2,6,6-trimethylcyclohex-2-en-1-one
• CAS: 169124-55-4
• 化学式: C₁₅H₂₈O₂Si
• 分子量: 268.472
• InChiKey: POOOTPCCECOICT-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.32
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone 在 Ra-Ni (W-2) 氢气 作用下， 以 乙醇 为溶剂， 生成 (4S,6RS)-4-tert-butyldimethylsilyloxy-2,6,6-trimethylcyclohexanone
  参考文献：
  名称：

  Lipase-catalyzed asymmetric synthesis of (R)- and (S)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone and their dihydro derivatives

  摘要：

  Racemic 4-hydroxy-2,6,6-trimethyl-2-cyclohexenon trans- and cis-2,6,6-trimethyl-2-cyclohexene-1,4-diols were prepared by reduction of 4-oxoisophorone with sodium borohydride-cerium chloride. Lipase (PS-30)-catalyzed kinetic resolution of (+/-)-cis-2,6,6-trimethyl-2-cyclohexene-1,4-diol with vinyl acetate led to (1R, 4S)-4-acetoxy-2,6, 6-trimethyl-2-cyclohexen-1-ol (81 %ee);and (1S, 4K)-1-acetoxy-2,6,6-trimethyl-2-cyclohexene-4-ol (92 %ee). Hydrolysis of the former monoacetate and recrytallization of the resulting material afforded enantiomerically pure (1R, 4S)-2,6,6-trimethyl-2-cyclohexene-1,4-diol. On the other hand, recrystallization of (1S, 4R) monoacetate itself provided an optically pure sample, which was then hydrolyzed to give (1S, 417)-2,6,6-trimethylcyclohexene-1,4-diol. Transformation of both diols into (S)- and (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone was conducted in two steps including silylation and oxidation. Catalytic hydrogenation of these (S)- and(R)-silyloxy enones dyer Raney nickel afforded the corresponding dihydro derivatives.

  DOI：

  10.1016/0957-4166(95)00159-m
• 作为产物：
  描述：

  [(1S,4R)-4-hydroxy-2,6,6-trimethylcyclohex-2-en-1-yl] acetate 在 咪唑 、 重铬酸吡啶 、 potassium carbonate 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 39.0h， 生成 (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone
  参考文献：
  名称：

  Lipase-catalyzed asymmetric synthesis of (R)- and (S)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone and their dihydro derivatives

  摘要：

  Racemic 4-hydroxy-2,6,6-trimethyl-2-cyclohexenon trans- and cis-2,6,6-trimethyl-2-cyclohexene-1,4-diols were prepared by reduction of 4-oxoisophorone with sodium borohydride-cerium chloride. Lipase (PS-30)-catalyzed kinetic resolution of (+/-)-cis-2,6,6-trimethyl-2-cyclohexene-1,4-diol with vinyl acetate led to (1R, 4S)-4-acetoxy-2,6, 6-trimethyl-2-cyclohexen-1-ol (81 %ee);and (1S, 4K)-1-acetoxy-2,6,6-trimethyl-2-cyclohexene-4-ol (92 %ee). Hydrolysis of the former monoacetate and recrytallization of the resulting material afforded enantiomerically pure (1R, 4S)-2,6,6-trimethyl-2-cyclohexene-1,4-diol. On the other hand, recrystallization of (1S, 4R) monoacetate itself provided an optically pure sample, which was then hydrolyzed to give (1S, 417)-2,6,6-trimethylcyclohexene-1,4-diol. Transformation of both diols into (S)- and (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone was conducted in two steps including silylation and oxidation. Catalytic hydrogenation of these (S)- and(R)-silyloxy enones dyer Raney nickel afforded the corresponding dihydro derivatives.

  DOI：

  10.1016/0957-4166(95)00159-m

文献信息

• Lipase-catalyzed asymmetric synthesis of (R)- and (S)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone and their dihydro derivatives
  作者：Akira Tanaka、Hiroshi Yamamoto、Takayuki Oritani

  DOI：10.1016/0957-4166(95)00159-m

  日期：1995.6

  Racemic 4-hydroxy-2,6,6-trimethyl-2-cyclohexenon trans- and cis-2,6,6-trimethyl-2-cyclohexene-1,4-diols were prepared by reduction of 4-oxoisophorone with sodium borohydride-cerium chloride. Lipase (PS-30)-catalyzed kinetic resolution of (+/-)-cis-2,6,6-trimethyl-2-cyclohexene-1,4-diol with vinyl acetate led to (1R, 4S)-4-acetoxy-2,6, 6-trimethyl-2-cyclohexen-1-ol (81 %ee);and (1S, 4K)-1-acetoxy-2,6,6-trimethyl-2-cyclohexene-4-ol (92 %ee). Hydrolysis of the former monoacetate and recrytallization of the resulting material afforded enantiomerically pure (1R, 4S)-2,6,6-trimethyl-2-cyclohexene-1,4-diol. On the other hand, recrystallization of (1S, 4R) monoacetate itself provided an optically pure sample, which was then hydrolyzed to give (1S, 417)-2,6,6-trimethylcyclohexene-1,4-diol. Transformation of both diols into (S)- and (R)-4-tert-butyldimethylsilyloxy-2,6,6-trimethyl-2-cyclohexenone was conducted in two steps including silylation and oxidation. Catalytic hydrogenation of these (S)- and(R)-silyloxy enones dyer Raney nickel afforded the corresponding dihydro derivatives.