The reaction of N-tosyl imines with heteroaromatic compounds: a new access to triheteroarylmethanes
作者:Baris Temelli、Dilek Isik Tasgin、Canan Unaleroglu
DOI:10.1016/j.tet.2010.06.070
日期:2010.8
Useful triheteroarylmethanes were prepared by the double Friedel–Crafts reaction of a wide variety of aromatic N-tosyl imines with furan, thiophene, and pyrrole in the presence of Cu(OTf)2 and Montmorillonite K-10 clay catalysts.
A mild, efficient and metal-free method was described for the green synthesis of dipyrromethanes from aldehydes and unsubstituted pyrrole catalyzed by SO3H-functionalized ionicliquids (SO3H-ILs) in aqueousmedia at room temperature. Notably, SO3H-ILs, 1-butylsulfonic-3-methylimidazolium hydrogen sulfate ([bsmim][HSO4]) was the most efficient catalyst for moderate to good yields of the corresponding
The synthesis, structures and properties of 3-pyrrolyl BODIPYs containing five membered aromatic heterocycles such as pyrrole, thiophene and furan at the meso-position are described.
Reactions between pyrrole and orthoesters: preparation of tri-(pyrrol-2-yl)alkanes
作者:Colin B Reese、Hongbin Yan
DOI:10.1016/s0040-4039(01)01031-0
日期:2001.8
Reactions between triethyl orthoformate, trimethyl orthoacetate and triethyl orthopropionate with pyrrole and chloroacetic acid lead to moderate yields of the corresponding tri-(pyrrol-2-yl)alkanes 5a, 5b and 5c, respectively. Under the same conditions, trimethyl orthobenzoate reacts with pyrrole and dichloroacetic acid to give the dipyrrin 7 in a relatively good yield.
Direct alkylation of pyrrole with vinyl substituted aromatics: versatile precursors for the synthesis of porphyrinoid macrocycles
作者:Seong-Jin Hong、Seung-Doo Jeong、Jaeduk Yoo、Jong Seung Kim、Juyoung Yoon、Chang-Hee Lee
DOI:10.1016/j.tetlet.2008.04.119
日期:2008.6
5-Substituted dipyrromethane analogues (8), (23) and (25) were synthesized by the reaction of 2-vinylpyrroles, 2-vinylthiophene or 2-vinylbenzenes with excess pyrrole in the presence of Lewis acids. Accordingly, tripyrromethane analogues could be obtained by starting with 2,5-divinyl thiophene or 2,6-divinylbenzenes. The reaction usually gave moderate yields and catalyst-dependent was seen in some