The present invention relates to ligands and catalyst systems for the hydroformylation of short and long chain olefins, preferably for the hydroformylation of ally alcohol producing 4-hydroxybutyraldehyde. The ligands disclosed herein are all-trans phosphinomethyl-cyclobutane ligands, such as, for example, all-trans- 1,2,3, 4-tetra[bis-(3, 5-xylyl)phosphinomethyl]-cyclobutane. The catalyst systems comprise these all-trans phosphinomethyl-cyclobutane ligands in combination with an organometallic rhodium complex such as, e.g., (acctylacetonato)-dicarbonyl-rhodium (I). The ligands and catalyst systems of the present invention may be employed in the hydroformylation of olefins, in particular in the hydroformylation of allylalcohol, and provide improved selectivity and high reaction yields. wherein R1 is alkyl, preferably methyl, ethyl or propyl, R2 is H or an alkoxy group, R3 and R4, independently of one another, CH2OR1, CH2O-aralkyl, CH2OH,CH2-[P(3,5-R1,R1-4-R2-phenyl)2] or CH2O-(CH2-CH2-O)m-H (with m being an integer between 1 and 1.000).
本发明涉及短链和长链烯烃的
配体和催化剂体系,优选用于产生
4-羟基丁醛的
丙烯醇的氢甲酰化反应。本文所述的
配体是全反式膦甲基
环丁烷配体,例如全反式-1,2,3,4-四[双-(3,5-二
甲苯基)膦甲基]-
环丁烷。该催化剂体系包括这些全反式膦甲基
环丁烷配体与有机
金属
铑配合物,例如(acctylacetonato)-二羰基-
铑(I)。本发明的
配体和催化剂体系可用于烯烃的氢甲酰化反应,特别是在
丙烯醇的氢甲酰化反应中,提供了改进的选择性和高反应产率。其中R1是烷基,优选是甲基、乙基或丙基;R2是氢或烷氧基;R3和R4彼此独立,是 R1、
CH2O-芳基烷基、 H、
CH2-[P(3,5-R1,R1-4-R2-苯基)2]或 -( - -O)m-H(其中m是介于1和1.000之间的整数)。