Eistert,B.; Fink,G.
Chemische Berichte, 1962 , vol. 95, p. 2395 - 2402
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Druey; Schmidt
Helvetica Chimica Acta, 1950 , vol. 33, p. 1080,1085
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CIBA
Patent: US2640830 , 1950 ;
diphosphorus pentasulfide; sodium tetrahydroborate
1.) sulfolane, 90 deg C for 24 h 2.) Et2O-EtOH, at room temperature for 3 h; Yield given. Multistep reaction;