In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 4-Bromoisoquinoline, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1532-97-4, name is 4-Bromoisoquinoline. In an article，Which mentioned a new discovery about 1532-97-4
Pd-catalysed procedures for the direct Heck arylation of diethyl vinylphosphonate with various aryl or heteroaryl halides toward the synthesis of diethyl 2-(aryl)vinylphosphonates are reported. Several homogeneous catalytic systems (i.e. Herrmann palladacycle, Nolan (NHC)-palladium catalyst, Pd(OAc)2/PPh3) were used and compared within the study. High conversions and selectivities were achieved under optimised conditions (2 mol% [Pd], NMP, K2CO3, 140 C) whatever the homogeneous catalyst used.
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Reference：
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem