Tungsten Hexachloride (WCl<sub>6</sub>) in the Presence of Dimethylsulfoxide Promoted Facile and Efficient One-Pot Ring Expansion-Chlorination Reactions of 1,3-Dithiolanes and 1,3-Dithianes
作者:Habib Firouzabadi、Nasser Iranpoor、Babak Karimi
DOI:10.1055/s-1999-2628
日期:1999.4
Tungsten hexachloride (WCl6) in the presence of DMSO could be efficiently used for the conversion of 1,3-dithiolanes and 1,3-dithianes to their corresponding chlorinated derivatives of dihydro-1,4-dithiin and dihydro-1,4-dithiepine in high yield, respectively.
Facile Ring-Expansion Substitution Reactions of 1,3-Dithiolanes and 1,3-Dithianes Initiated by Electrophilic Reagents to Produce Monohalo-, -cyano-, -azido- and -thiocyanato-1,4-dithiins and -1,4-dithiepins
Mild and convenient methods for the high yielding ring-expansion substitution reactions of 1,3-dithiolanes and 1,3-dithianes generated from different aryl methyl ketones using different electrophilic reagents are reported. In this study, facile preparations of monohalo-, -cyano-, -azido-, -thiocyanato-1,4-dithiins and -1,4-dithiepins are described. A general mechanism is also proposed for the reactions
MOLYBDENUM PENTACHLORIDE (MOCL<sub>s</sub>) PROMOTES EFFICIENT RING-EXPANSION AND RING-EXPANSION-CHLORINATION OF 1,3-DITHIOLANES AND 1,3-DITHIANES IN THE PRESENCE OF DMSO. PART 3<sup>l</sup>
作者:Habib Firouzabadi、Babak Karimi
DOI:10.1080/10426500108040268
日期:2001.8
Ring-expansion and ring-expansion-chlorination of 1,3-dithiolanes and dithianes conducted in the presence of MoCl5 and DMSO are described.
NEVALAINEN, V.;POHJALA, E., FINN. CHEM. LETT., 14,(1987) N 2, 63-69