TY - JOUR A1 - Sasaki, Teppei A1 - Moriyama, Katsuhiko A1 - Togo, Hideo T1 - One-pot preparation of 4-aryl-3-bromocoumarins from 4-aryl-2-propynoic acids with diaryliodonium salts, TBAB, and Na2S2O8 JF - Beilstein Journal of Organic Chemistry PY - 2018/// VL - 14 SP - 345 EP - 353 SN - 1860-5397 DO - 10.3762/bjoc.14.22 PB - Beilstein-Institut JA - Beilstein J. Org. Chem. UR - https://doi.org/10.3762/bjoc.14.22 KW - 3-aryl-2-propynoic acid KW - bromo-cyclization KW - coumarin KW - diaryliodonium triflate KW - O-phenylation N2 - Various 4-aryl-3-bromocoumarins were smoothly obtained in moderate yields in one pot by treating 3-aryl-2-propynoic acids with diaryliodonium triflates and K2CO3 in the presence of CuCl, followed by the reaction with tetrabutylammonium bromide (TBAB) and Na2S2O8. The obtained 3-bromo-4-phenylcoumarin was transformed into 4-phenylcoumarin derivatives bearing C–H, C–S, C–N, and C–C bonds at 3-position. ER -