Methyl Methacrylate → Cyclohexyl methacrylate

HRID 1699794

反応式

HRID 1699794 の反応式
[C:1]([O:6][CH3:7])(=[O:5])[C:2]([CH3:4])=[CH2:3].[CH:8]1(O)[CH2:13][CH2:12]C[CH2:10][CH2:9]1>C([Sn](=O)CCCC)CCC.CO>[C:1]([O:6][CH:7]1[CH2:12][CH2:13][CH2:8][CH2:9][CH2:10]1)(=[O:5])[C:2]([CH3:4])=[CH2:3]

参加物

5

反応物 2

HCID 6658Methyl MethacrylateHCID 7966Cyclohexanol

生成物 1

HCID 7561Cyclohexyl methacrylate収率 72%

試薬・触媒・溶媒 2

HCID 61221Dibutyltin oxide触媒HCID 887Methanol溶媒

実験手順

Using a reflux apparatus equipped with a 20-plates Oldershaw column as the distillation column, a 3-liter four-necked flask with a side arm was charged with 1,401 g (14 moles) of methyl methacrylate, 701 g (7 moles) of cyclohexanol, 12.6 g of dibutyltin oxide, and 1.18 g (corresponding to 0.1% of the theoretical yield of the product) of MTX as a polymerization inhibitor. This mixture was subjected to an ester exchange reaction. The methanol formed as a by-product during reaction was removed from the system together with the methyl methacrylate. The resulting reaction product was purified by simple distillation using an empty column having a length of 20 cm, so that 848 g of cyclohexyl methacrylate was obtained. During the course of the reaction and distillation, polymerization occurred neither in the reactor nor the column. However, the cyclohexyl methacrylate thus obtained was slightly colored and had a color number (APHA) of 140.

後処理

  1. customequipped with a 20-plates Oldershaw column as the distillation column, a 3-liter four-necked flask with a side arm
  2. customwas removed from the system together with the methyl methacrylate
  3. customThe resulting reaction product
  4. distillationwas purified by simple distillation

出典と根拠

ORDレコード
ord-0fddd5e962d44f39a93b571b3812c32c
出典データセット
uspto-grants-2002_02
特許番号
US06348598B1

関連ノート

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