The hetero-Diels–Alder addition of sulfur dioxide: structure of the first crystalline sultine. Quantum calculations on the conformations of 6-fluoro-3,6-dihydro-1,2-oxathiine 2-oxides
作者:Elena Roversi、Rosario Scopelliti、Euro Solari、Raphaël Estoppey、Pierre Vogel、Pedro Braña、Bibiana Menéndez、JoséÁngel Sordo
DOI:10.1039/b103096p
日期:——
The hetero-Diels–Alder addition of sulfur dioxide to (E)- and (Z)-4-(fluoromethylidene)-3-methylene-2,3-dihydro- naphthalene follows the endo Alder rule. The first example of a crystalline sultine has been obtained. In agreement with high level quantum calculations, (1SR,3SR)-1-fluoro-1,4,5,6-tetrahydronaphtho[2,1-d ][1,2]oxathiine 3-oxide adopts a sofa conformation in its ground state.
二氧化硫与 (E)- 和 (Z)-4-(fluoromethylidene)-3-methylene-2,3-dihydronaphthalene 的异质 Diels-Alder 加成遵循内 Alder 规则。已经获得了结晶苏尔丁的第一个例子。与高级量子计算一致,(1SR,3SR)-1-fluoro-1,4,5,6-tetrahydronaphtho[2,1-d][1,2]oxathiine 3-oxide 在其基础上采用沙发构象状态。