1,4-Butanediol → 1,6,8-Trioxa-spiro(4,6)undecane
反応式
C(O[C:4]1([O:9][CH2:10]C)[CH2:8][CH2:7][CH2:6][O:5]1)C.C(O)[CH2:13][CH2:14][CH2:15][OH:16]>>[O:5]1[C:4]2([CH2:13][CH2:14][CH2:15][O:16][CH2:10][O:9]2)[CH2:8][CH2:7][CH2:6]1参加物
3
実験手順
50 grams of 2,2-diethoxytetrahydrofuran and 28.1 grams of 1,4-butane diol previously mixed with 0.05 grams of polyphosphoric acid, were reacted for 3.25 hours over an increasing temperature span of 70° to 130° C., and under atmospheric pressure according to Example 45. Then the reactants were heated under reduced pressure of 120 mm to 2.4 mm Hg for 4 hours at 110° to 125° C. to yield 1,6,8-trioxa-spiro(4,6)undecane. The spiro compound was polymerized in a sealed tube at 125° C. in the presence of a Lewis acid catalyst, i.e. SbF5, PF5 or BF3, to yield the polymer, where n is 10 to 1000. ##STR50##
後処理
- customwere reacted for 3.25 hours over an increasing temperature span of 70° to 130° C.
- temperatureThen the reactants were heated under reduced pressure of 120 mm to 2.4 mm Hg for 4 hours at 110° to 125° C.
出典と根拠
- ORDレコード
- ord-6780e3016fc74340af87734b7c5c1c84
- 出典データセット
- uspto-grants-1978_12
- 特許番号
- US04131648
反応ノート
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