Some Novel Schiff Bases from Pyruvic Acid with Amines Containing N &S Donor Atoms: Synthesis, Spectral Studies and X-Ray Crystal Structures

• 作者: Abdul Azim Jambol Aminul Huq Mirza Malai Haniti Sheikh Abdul Hamid Md. Shafiqul Islam Mohammad Rezaul Karim
• 来源期刊: 有机化学国际期刊(英文)
• 学科: 化学
• 关键词: Pyruvic Acid Schiff Bases THIOCARBOHYDRAZIDE S-Alkyldithiocarbazates THIOSEMICARBAZIDE TRIAZINE N and S CONTAINING AMINES
• 年，卷（期）: 2017,（1）
• 页码范围: 42-56
• 页数: 15页
• 分类号: O6

摘要

Four Schiff bases, from pyruvic acid (1) with amines containing N and S donor atoms, thiocarbohydrazide (2, 61%), 2-methyl-3-thiosemicarbazide (3, 26%), S-benzyldithiocarbazate (4, 51%) and S-n-octyldithiocarbazate (5, 63%) have been successfully synthesized. The conventional method was used and a series of novel linear and cyclic Schiff bases were obtained with or without catalyst. All the Schiff bases were fully characterized by CHN elemental analysis, FT-IR, 1H & 13C NMR, EI-MS and two of the Schiff bases were further characterized by X-ray crystallographic structure analysis. Compound 2 crystallizes in the triclinic space group P-1 and unit cell dimensions are: a = 4.1777(8), b = 5.9538(11), c = 13.458(3) Å, α = 92.759(6), β = 90.813(6), γ = 100.040(6)°, R1 = 0.0439. Compound 3 crystallizes in the orthorhombic space group P n a 2(1) and unit cell dimensions are: a = 5.5992(2), b = 11.3962(5), c = 10.6473(5), α = 92.759(6), β = 90.813(6), γ = 100.040(6)°, R1 = 0.0285. Compounds 2 and 3 were obtained as cyclic Schiff bases which are triazine derivatives.