Process to prepare a terminal aldehyde

Details Process to prepare a terminal aldehyde Process to prepare a terminal aldehyde

C - Chemistry, Metallurgy

07

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C07F 15/00 (2006.01) B01J 31/18 (2006.01) C07C 45/50 (2006.01) C07C 47/02 (2006.01) C07C 51/373 (2006.01) C07C 59/325 (2006.01) C07C 67/347 (2006.01) C07C 67/38 (2006.01) C07C 69/67 (2006.01) C07C 253/30 (2006.01) C07C 255/17 (2006.01) C07F 9/145 (2006.01) C07F 9/6574 (2006.01)

Patent

CA 2249026

Process for the preparation of a terminal aldehyde by hydroformylation by reacting an ethylenically unsaturated organic compound with carbon monoxide and hydrogen in the presence of a catalyst system comprising iridium or rhodium and a bidentate organic phosphite ligand wherein the two phosphorus atoms of the phopshite ligand are linked with a 2,2'-dihydroxyl-1,1'- binapthalene bridging group having structure (Q), (Q) being (a) or (b), in which R1 and R2 are substituents other than hydrogen and in which R3 and R4 are the same or different substituted monovalent aryl groups and/or any one of OR3 and OR4 connected to one phosphorus atom forms an-O-R5-O-group, where R5 is a divalent organic group containing one or two aryl groups.

L'invention concerne un procédé de préparation d'un aldéhyde terminal par hydroformylation, qui consiste à faire réagir un composé organique éthyléniquement insaturé avec un monoxyde de carbone et de l'hydrogène en présence d'un système de catalyseur comprenant de l'iridium ou du rhodium et un ligand phosphite bidenté, les deux atomes de phosphore du ligand phosphite étant lié avec un groupe de pontage 2,2'-dihydroxyl-1,1'-binaphtalène présentant la structure (Q), (Q) étant (a) ou (b), dans laquelle R?1¿ et R?2¿ sont des substituants autres que hydrogène et R?3¿ et R?4¿ sont des groupes aryles monovalents substitués identiques ou différents et/ou OR?3¿ ou OR?4¿ relié à un atome de phosphore forme un groupe O-R?5¿-O- dans lequel R?5¿ est un groupe organique divalent contenant un ou deux groupes aryles.

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