在配有磁力搅拌器、温度计、回流冷凝管的1000ml三口圆底烧瓶中，依次

在配有磁力搅拌器、温度计、回流冷凝管的1000ml三口圆底烧瓶中，依次加入含量为84.6%的莰烯136.234g（1mol）、36.036g多聚甲醛（1.2mol）、292.859g冰乙酸，加热升温至1400C并回流反应18-24h。反应结束后将反应液升温至1400C蒸馏出未反应完的冰乙酸并回收。将圆底烧瓶中的残余液冷却后倒入400ml水中，搅拌后静置分出油层，水层用3*50ml的石油醚萃取，合并有机相并加入饱和碳酸钠溶液使之为中性，分出水层；油层用10%的氯化钠溶液洗涤分出有机相并用无水硫酸钠干燥4h,干燥、过滤。将液体转移到500ml圆底烧瓶中，常压下蒸溜出石油醚，待液体冷却后进行减压蒸馏，

在配有磁力搅拌器、温度计、回流冷凝管的1000ml三口圆底烧瓶中，依次加入含量为84.6%的莰烯136.234g（1mol）、36.036g多聚甲醛（1.2mol）、292.859g冰乙酸，加热升温至1400C并回流反应18-24h。 反应结束后将反应液升温至1400C蒸馏出未反应完的冰乙酸并回收。 将圆底烧瓶中的残余液冷却后倒入400ml水中，搅拌后静置分出油层，水层用3*50ml的石油醚萃取，合并有机相并加入饱和碳酸钠溶液使之为中性，分出水层；油层用10%的氯化钠溶液洗涤分出有机相并用无水硫酸钠干燥4h,干燥、过滤。 将液体转移到500ml圆底烧瓶中，常压下蒸溜出石油醚，待液体冷却后进行减压蒸馏，

In a 1000ml three port round bottom flask equipped with a magnetic stirrer, a thermometer and a reflux condenser, 136.234g (1mol) camphene, 36.036g (1.2mol) paraformaldehyde and 292.859g glacial acetic acid with 84.6% content were successively added, heated to 1400C and refluxed for 18-24h. After the reaction, the reaction solution was heated to 1400C, and the unreacted glacial acetic acid was distilled out and recovered. Cool the residual liquid in the round bottom flask, pour it into 400ml water, stir it and leave it still to separate the oil layer, extract the water layer with 3 * 50ml petroleum ether, combine the organic phase and add saturated sodium carbonate solution to make it neutral, separate the water layer; wash the oil layer with 10% sodium chloride solution to separate the organic phase and dry it with anhydrous sodium sulfate for 4h, dry and filter. Transfer the liquid to a 500ml round bottom flask, evaporate and slide out the petroleum ether under normal pressure, and conduct vacuum distillation after the liquid cools,<br>