Pyrolysis of phenylalkylsulphonyl azides and 2-phenethyl azidoformate. Selectivity of sulphonylnitrenes and contrast between sulphonyl- and carbonyl-nitrenes
作者:Rudolph A. Abramovitch、Shivakumar B. Hendi、Albert O. Kress
DOI:10.1039/c39810001087
日期:——
solution thermolysis of Ph[CH2]nSO2N3 indicate that intramolecular addition to the phenyl group is preferred in solution, provided that up to an eight-membered sultam ring is formed, otherwise side-chain insertion results, while in the gas phase the latter process is favoured when n= 4,5, but not 3; some 5,6,7,8-tetrahydroquinoline is obtained when n= 3 at 990 °C, but 2-phenethyl azidoformate gave monomeric
Ph [CH 2 ] n SO 2 N 3的快速真空热解和溶液热解表明,在溶液中分子内加成苯基是优选的,条件是形成最多八元的杜马环,否则会产生侧链插入,在气相中,当n = 4,5而不是3时,则优先采用后者。当n = 3在990°C时可获得一些5,6,7,8-四氢喹啉,但叠氮基甲酸2-苯乙酯生成了单体四氢-1、3-恶嗪基[3,4- a ] azepin-2-one和4-苯基-恶唑烷酮,即使在990°C时也没有二氢环戊[ b ]吡啶。