Mechanistic Studies on Thiazolidine Formation in Aldehyde/Cysteamine Model Systems
作者:Tzou-Chi Huang、Lee-Zen Huang、Chi-Tang Ho
DOI:10.1021/jf9705633
日期:1998.1.1
A mechanism was proposed to elucidate the formation of a thiazolidine in aldehyde/cysteamine model systems. Buffer dramatically promotes thiazolidine formation from formaldehyde and cysteamine. Phosphate tends to stabilize the primary carbocation formed, and this may lead to completion of the cyclization by attack of the amino nitrogen on the activated carbon. Protic solvent, by removing the water
提出了一种机制来阐明在醛/半胱胺模型系统中噻唑烷的形成。缓冲液可显着促进甲醛和半胱胺形成噻唑烷。磷酸盐趋于稳定形成的一级碳正离子,这可能会由于氨基氮对活性炭的攻击而导致环化反应完成。通过除去水分子,质子溶剂进一步增强了噻唑烷的形成。磷酸根离子催化的氧化还原反应导致噻唑烷通过氢化物转移转化为相应的噻唑啉。