Butane-1,4-diol is produced by converting allyl alcohol to an allyl t-alkyl or -cycloalkyl ether of the general formula:
wherein R, and R2 each, independently of the other, represent a C, to C4 alkyl radical, and R3 and R4 each, independently of the other, represent a hydrogen atom or a C1 to C3 alkyl radical, or wherein R1 represents a C, to C4 alkyl radical, R2 and R3 together with the carbon atoms to which they are attached form a 5-membered or 6-membered cycloaliphatic ring, and R4 represents a hydrogen atom or a C1 to C3 alkyl radical, followed by reacting resulting compound of formula (III) under hydroformylation conditions with carbon monoxide and hydrogen in the presence of a hydroformylation catalyst to form a corresponding aldehyde-ether of the general formula.
reducing resulting aldehyde-ether of the general formula (II) to form a corresponding hydroxy-ether of the general formula:
and cleavlng resulting hydroxy-ether of the general formula (II) to give butane-1,4-diol. Typically R, and R2 each represent a methyl group whilst Rj and R4 each represent a hydrogen atom. The alkene of the general formula:
released upon cleavage of the hydroxy-ether of formula (II) can be recycled for reaction with further allyl alcohol to form a further quantity of the ether of the general formula (III).
丁烷-1,4
-二醇是通过将烯丙基醇转化为通式如下的烯丙基叔烷基或环烷基醚而制得的:
其中 R 和 R2 各自独立地代表一个 C 至 C4 烷基,R3 和 R4 各自独立地代表一个氢原子或一个 C1 至 C3 烷基,或其中 R1 代表一个 C 至 C4 烷基,R2 和 R3 与它们所连接的碳原子一起形成一个 5 元或 6 元环脂族环、和 R4 代表氢原子或 C1 至 C3 烷基,然后在氢甲酰化催化剂存在下,在氢甲酰化条件下使得到的式 (III) 化合物与
一氧化碳和氢反应,生成相应的通式醛醚。
还原生成的通式(II)醛醚,形成相应的通式羟基醚:
并裂解生成的通式(II)的羟基醚,得到
丁烷-1,4
-二醇。通常 R 和 R2 各代表一个甲基,而 Rj 和 R4 各代表一个氢原子。通式中的烯烃
式(II)的羟基醚裂解后释放出的烯烃可再与烯丙基醇反应生成更多通式(III)的醚。