Poly(diallyldimethylammonium chloride) as an Efficient Phase Transfer Catalyst in Solvent‐Free Reduction of Carbonyl Compounds with NaBH₄

Abstract

Poly(diallyldimethylammonium chloride) resin was used as an efficient polymeric phase transfer catalyst, which catalyzed the chemoselective reduction of aldehydes and ketones by NaBH 4 to give the corresponding alcohols in high yields under solvent-free conditions.

Synthesis and Application of Poly(diallyldimethylammonium tribromide) as a Novel Polymeric Brominating Agent

“…The other advantages of organic ammonium tribromides are involving their solid form, high stability, ease of storage, ease of transport, maintenance of desired stoichiometry and mild reaction condition. 6 Hitherto, in the literature several tribromides species have been reported i.e, tetramethylammonium tribromide (TMATB), 7 phenyltrimethylammonium tribromide (PTATB), 8 cetyltrimethylammonium tribromide (CetTMATB), 9 tetrabutylammonium tribromide (TBATB), 10 1,8-diazobicyclo [5,4,0]-tetrabutylammonium tribromide (DBUHBr 3 ) 11 and pyridinehydrobromide perbromide (PyHBr 3 ). 12 However, their preparations involve elemental bromine and in some cases HBr as well.…”

“…3 Recently, this polymer was introduced as a new and efficient phase transfer catalyst. 4,5 Generally, bromination is carried out by elemental bromine, but organic ammonium tribromides (OATB) are preferable owing to hazards associated with bromine. The other advantages of organic ammonium tribromides are involving their solid form, high stability, ease of storage, ease of transport, maintenance of desired stoichiometry and mild reaction condition.…”