Studies on thiazoline and thiazolidine derivatives. XI. Synthesis of 3-N-alkylthiocarbamoyl-2-alkyliminothiazolidines.
作者:YUICHI YAMAMOTO、REIKO YODA、MAKIKO MATSUMURA
DOI:10.1248/cpb.23.2134
日期:——
The compounds synthesized through the route (a) and the route (b) as shown in Chart 1 have been assigned by S. Gabriel in the past and by E. Cherbuliez, et al. recently to Type A, N-alkyl-N'-alkyl-N'-(2-thiazolin-2-yl) thiourea (5). We had some doubt in the structure of the above compounds synthesized through the route (a) and (b), so they were hydrolyzed with 15% H2SO4 to give Type B, 3-N-alkylthiocarbamoyl-2-oxothiazolidine (6) which was assigned with infrared spectrum (IR), Mass Spectra and nuclear magnetic resonance (NMR) data and confirmed by synthesis of 6 through the route (c). Thus, it was confirmed that the compounds obtained by our synthesis through the route (a) and (b) possessed the Type B structure ; 3-N-alkylthiocarbamoyl-2-alkyliminothiazolidine (4), instead of the Type A structure. The data for ultraviolet spectrum (UV), IR, MS and NMR are shown in Table I, II and III.
通过图1所示的路线(a)和路线(b)合成的化合物过去已由S. Gabriel和E. Cherbuliez等人分配。最近到A型,N-烷基-N'-烷基-N'-(2-噻唑啉-2-基)硫脲(5)。我们对上述路线(a)和(b)合成的化合物的结构有些疑问,因此用15% H2SO4水解得到B型,3-N-烷硫基氨基甲酰基-2-氧代噻唑烷(6),即用红外光谱(IR)、质谱和核磁共振(NMR)数据指定并通过路线(c)合成6来证实。由此,证实我们通过路线(a)和(b)合成得到的化合物具有B型结构; 3-N-烷硫基氨基甲酰基-2-烷基亚氨基噻唑烷(4),代替A型结构。紫外光谱(UV)、IR、MS和NMR的数据如表I、II和III所示。