Reference

2-Hydrazinobenzothiazoles

2-Hydrazinobenzothiazoles. (Hodogaya Chemical Co., Ltd.In this study， 53065-23-9 and 20174-68-9 are also used., Japan). Jpn. Kokai Tokkyo Koho JP 59007179 A2 14 Jan 1984 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07D277-82. APPLICATION: JP 82-113936 2 Jul 1982. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) 2-Hydrazinobenzothiazoles I (R = H, 4-Me, 4-Cl, 6-Me, 4-MeO, 6-EtO) were prepd. by reaction of II with N2H4 in the presence of acids in solvents selected from C4-C8 alkanols, cyclohexanol, PhCH2OH, furfuryl alc., tetrahydrofurfuryl alc., and HO(CH2)6OH. Thus, 27 g AcOH was added to a mixt. of 49.3 g II (R = 4-Me) and 56.3 g 80% N2H4.H2O in HO(CH2)6OH at room temp. and the whole stirred 4 h at 120° under N to give 88% I (R = 4-Me) with 98% purity. .