发明授权
US06392079B1 Method and apparatus for preparing monofunctional aromatic chloroformates suitable for use as chainstopping agents 有权
制备适用于止痛剂的单官能芳族氯甲酸酯的方法和装置

Method and apparatus for preparing monofunctional aromatic chloroformates suitable for use as chainstopping agents
摘要:
A continuous process for the preparation of monofunctional aromatic chloroformates (MAC) having the structure (I) wherein n is an integer from 1 to 5, and R1 represents hydrogen, a branched or unbranched alkyl group having from 1-15 carbon atoms, an aryl group which may be substituted or unsubstituted, a cycloaliphatic group which may be substituted or unsubstituted, or an arylalkyl group which may be substituted or unsubstituted, the method comprising the steps of a) introducing 1) an aqueous caustic solution; 2) a carbonyl chloride; 3) at least one monofunctional hydroxyaromatic compound; and 4) at least one inert organic solvent into a continuous reaction system; and b) effecting contact between 1), 2), 3) and 4) for a time and at conditions sufficient to produce a MAC of structure (I).
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