Abstract Photochemical cyclization of N -allyl- N -(2-formylphenyl)-4-methylbenzenesulfonamide in DMSO under irradiation with a light-emitting diode at λ 365 nm afforded 29% of 3-(4-methylbenzenesulfonyl)-1,1a,2,3-tetrahydro-7b H -cyclopropa c quinolin-7b-ol. The reaction is diastereoselective, and it requires no catalysis.
Rudik et al. (Mon,) studied this question.