Fused heterocycles with nitrogen incorporation are of particular bioactive use and high importance in many research fields, especially isoquinoline-based [6/6/5] tricycles. Here, we report a unique strategy to access multifunctional N-fused tricycles from α,β-unsaturated isoquinoline ketone and sulfonamide under mild reaction conditions. The methodology features wide substrate tolerance, and a set of N-fused heteroarenes including quinoline, phthalazine, quinazoline, quinoxaline, and benzothiazole cores are furnished efficiently. Moreover, the protocol is easy to scale up to synthesize lamellarin analogues, and the amide group of the product is also easy to transfer to other functional groups.

Novel cross Rauhut–Currier reactions, involving chiral phosphine catalysis, between vinyl ketones and terminal-carbonyl-substituted para-quinone methides are presented.

The first synthesis of well-defined poly[(phenylmethylene-co-methylpropenylene)-b-methylene,[ (C1-co-C3)b-C1],t erpolymers was achieved by one-pot borane-initiated random copolymerization of w-methylallyl (C3 units,c hain is growing by three carbon atoms at at ime) and benzyltriphenylarsonium (C1 units,chain is growing by one carbon atom at at ime) ylides,f ollowed by polymerization of sulfoxonium methylide (C1 units). Other substituted arsonium ylides,s uch as prenyltriphenyl, propyltriphenyl and (4-fluorobenzyl)triphenyl can also be used instead of benzyltriphenylarsonium. The obtained terpolymers are well-defined, possess ap redictable molecular weight and low polydispersity (M n,NMR = 1.83-9.68 10 3 gmol À1 , = 1. 09-1.22). An unexpected light emission phenomenon was discoveredi nt hese non-conjugated terpolymers,asconfirmed by fluorescence and NMR spectroscopy. This phenomenon can be explained by the isomerization of the double bonds of allylic monomeric units along the chain of the terpolymers (isomerization-induced light emission).