Fig. 2From: Quantification of karrikins in smoke water using ultra-high performance liquid chromatography–tandem mass spectrometryPreparation scheme of karrikins. a TEMPO, NCS, TBAB; b (EtO)2POCH2CO2Et, NaH; c CF3COOH; d ClCOOEt, pyridine; e Et3N, CH2Cl2; f Pd(PPh3)4, THF; g NBS, CHCl3; h CH3B(OH)2, Pd(OAc)2, S-Phos, tBuOK, tolueneBack to article page