申请人:——
公开号:US20030149271A1
公开(公告)日:2003-08-07
The invention relates to a method for the production of acyloxy acetaldehydes of formula (I), wherein R can represent an alkyl, aryl, heteroaryl, alkalyl, aklylheteroaryl or aralkyl radical which has been optionally substituted once or several times or a heterocycle or alkyl heterocycle which has been substituted once or several times, by reacting a compound of formula (II), wherein R has the meaning previously defined and M can be an alkali or alkaline earth atom, in an appropriate solvent with a compound of formula (III), wherein R
1
and R
2
independently represent a C
1
-C
6
-alkyl radical or together represent a C
2
-C
6
-alkyl radical and X represents a halogen atom, whereupon the correspondingly formed dialkylacetal of formula (IV), wherein R, R
1
and R
2
have the previously described meaning, undergoes acetal cleavage to obtain the desired acyloxy acetaldehyde of formula (I).
本发明涉及一种制备式(I)的酰氧基乙醛的方法,其中R可以代表一种已经选择性地取代一次或多次的烷基、芳基、杂芳基、烷基、烷基杂芳基或芳基烷基基团,或者是一种已经选择性地取代一次或多次的杂环或烷基杂环,通过将式(II)的化合物与式(III)的化合物在适当的溶剂中反应,其中R具有上述定义的含义,M可以是碱金属或碱土金属原子。随后,相应形成的式(IV)的二烷基缩醛,其中R、R1和R2具有先前描述的含义,经历缩醛断裂以获得所需的式(I)的酰氧基乙醛。