Process for the preparation of TCD-dialdehyde

摘要

The production of 3(4),8(9)-bis-formyltricyclo-[5.2.1.0 2,6>]-decane involves heterogeneous hydroformylation of dicyclopentadiene with synthesis gas using Group VIII transition metal complexes with water-soluble organo-phosphorus(III) compounds, followed by hydroformylation of the mono-formyl compound in a homogeneous organic phase. A method for the production of 3(4),8(9)-bis-formyltricyclo[5.2.1.0 2.6>]decane (TCD dialdehyde) involves: (a) hydroformylation of dicyclopentadiene (DCP) with synthesis gas at 70-150[deg]C and 0.5-10 MPa in a heterogeneous system with an aqueous solution containing Group VIII transition metal complexes of water-soluble organo-phosphorus(III) compounds, to give 8(9)-formyltricyclo[5.2.1.0 2.6>]dec-3-ene; (b) further hydroformylation with synthesis gas at 70-140[deg]C and 5-35 MPa in a homogeneous organic phase in presence of Group VIII transition metal compounds; and (c) distillation of TCD dialdehyde.