Rh-catalyzed intramolecular cyclization of 1-sulfonyl-1,2,3-triazole and sulfinate. Concise preparation of sulfonylated unsaturated piperidines
作者:Ayana Furukawa、Takeshi Hata、Masayuki Shigeta、Hirokazu Urabe
DOI:10.1016/j.tetlet.2019.01.012
日期:2019.3
When 4-[3-(methanesulfinyloxy)propyl]-1-(arenesulfonyl)-1,2,3-triazoles were treated with rhodium catalysts of the type Rh2(RCO2)4, a new intramolecular cyclization took place to afford 2,3-didehydro-1-(arenesulfonyl)-3-(methanesulfonyl)piperidines in good yields. This reaction most likely proceeds via a new reorganization of bonds in the same molecule, consisting of the addition of the sulfur atom
当用Rh 2(RCO 2)4型铑催化剂处理4- [3-(甲亚磺酰氧基)丙基] -1-(芳烃磺酰基)-1,2,3-三唑时,发生新的分子内环化反应,得到2 ,3-二氢-1-(芳烃磺酰基)-3-(甲磺酰基)哌啶,收率高。该反应很可能是通过同一分子中键的新重组而进行的,包括将亚磺酸酯的硫原子添加到由磺酰基三唑生成的α-(磺酰氨基)卡宾部分中,然后对磺酰氨基氮进行反攻带有亚磺酸酯氧末端的碳。