Preparation method of trans-2-[(3R)-3-benzyloxy-1-pyrrolidinyl]-1-cyclohexanol
A technology of benzyloxypyrrolidinyl salt and pyrrolidinyl, which is applied in the field of preparation of trans-2-[(3R)-3-benzyloxy-1-pyrrolidinyl]-1-cyclohexanol, capable of Solve the problems of shortened reaction time, long reaction time, and low yield, and achieve the effects of low price, high synthesis efficiency, and high yield
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Embodiment 1
[0028] Embodiment 1, the preparation of trans-2-[(3R)-3-benzyloxy-1-pyrrolidinyl]-1-cyclohexanol (I)
[0029] Add 5.0g (R)-3-benzyloxypyrrolidine oxalate (II), toluene 100ml, water 100ml, epoxy cyclohexane 1.9g, potassium hydroxide 2.1g, tetrabutyl bromide to the reaction flask Ammonium 0.6g, heated at 80°C for 4.5h, separated, the organic layer was dried over anhydrous sodium sulfate, filtered with suction, and the filtrate was concentrated under reduced pressure to obtain 4.9g of a light yellow oil with a yield of 95.1% and a purity of 98.0%.
[0030] 1 H-NMR (CDCl 3 , 300M) δ: 7.34~7.27 (m, 5H, Ar-H); 4.50 (s, 2H, CHOC H 2 Ph); 4.13~4.07(m, 1H, C H OH); 3.37~3.32(m, 1H, C H OCH 2 Ph); 2.94~2.68(m, 4H, C H 2 NC H 2 ); 2.48~2.46 (m, 1H, C H N); 2.13~2.00(m, 2H, NCH 2 C H 2 ); 1.80~1.73(m, 4H, C H 2 CH 2 CH 2 C H 2 ); 1.27~1.16(m, 4H, CH 2 C H 2 C H 2 CH 2 ).
[0031] MS (m / z): 276 ([M+H] + ).
Embodiment 2
[0032] Embodiment 2, the preparation of trans-2-[(3R)-3-benzyloxy-1-pyrrolidinyl]-1-cyclohexanol (I)
[0033] Add 5.0g (R)-3-benzyloxypyrrolidine hydrochloride (II), toluene 100ml, water 100ml, epoxycyclohexane 2.4g, potassium hydroxide 2.6g, tetrabutyl bromide to the reaction flask Ammonium 0.7g, heated at 80°C for 4.5h, separated into layers, the organic layer was dried over anhydrous sodium sulfate, filtered with suction, and the filtrate was concentrated under reduced pressure to obtain 6.1g of light yellow oil with a yield of 94.7% and a purity of 98.2%.
Embodiment 3
[0034] Embodiment 3, the preparation of trans-2-[(3R)-3-benzyloxy-1-pyrrolidinyl]-1-cyclohexanol (I)
[0035] Add 5.0g (R)-3-benzyloxypyrrolidine p-toluenesulfonate (II) to the reaction flask, toluene 100ml, water 100ml, epoxycyclohexane 1.5g, potassium hydroxide 1.6g, tetrabutyl Ammonium bromide 0.5g, heated at 80°C for 4.5h, separated into layers, the organic layer was dried over anhydrous sodium sulfate, filtered with suction, and the filtrate was concentrated under reduced pressure to obtain 3.8g of light yellow oil with a yield of 96.4% and a purity of 97.9%.
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