1: diethyl ether 2: NaOMe, MeOH / diethyl ether View Scheme

in dichloromethane byproducts: bis(4-methylthiobenzoyl) disulfide; soln. of SnCl4 in CH2Cl2 added to soln. of piperidinium 4-methylbenzenecarbodithioate (molar ratio 1:4) in CH2Cl2; stirred at 20°C for 1h; solvent removed under reduced pressure; dissolved in CH2Cl2; filtered; sepd. by fractional crystn.; elem. anal.;

1: 72 percent / diethyl ether / 2 h / 12 °C 2: 82 percent / ethanol; diethyl ether / 2 h / Ambient temperature 3: 52 percent / benzene; methanol; hexane / 18 °C 4: 60 percent / diethyl ether / 24 h / 20 - 25 °C View Scheme

2: 32 percent View Scheme

1: 72 percent / diethyl ether / 2 h / 12 °C 2: 73 percent / 24 h / Heating View Scheme