
TY  - JOUR
A1  - Harris, RLN 
A1  - Mcfadden, HG 
T1  - Fused Heterocycles From Pyrrolethiols. Thieno[2,3-B]Pyrroles, Thieno[3,2-B]Pyrroles and Thiazolo[3,2-a]Pyrroles From Pyrrol-2-Yl Phenacyl Sulfides
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 6
SP  - 887
EP  - 892
KW  - 
UR  - https://doi.org/10.1071/CH9860887 
N2  - A reinvestigation of the cyclization of pyrrol-2-yl phenacyl sulfides in polyphosphoric acid has shown that the major product is a thieno[3,2-b]pyrrole, where rearrangement of the sulfur substituent from position 2 to position 3 has preceded cyclization. When TiCl4 is used as cyclocondensation reagent minimal rearrangement is observed and the product obtained is either a thiazolo[3,2-a]pyrrole when the pyrrole nitrogen is unsubstituted, or a thieno[2,3-b]pyrrole where an N-substituent is present. 
ER  -

