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Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, LXXVI Regioselektive Cyclocotrimerisierung einer Thiophosphinit‐Einheit mit Methylpropinoat
Author(s) -
Lindner Ekkehard,
Haase Cornelius,
Mayer Hermann August
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911240917
Subject(s) - chemistry , bicyclic molecule , regioselectivity , medicinal chemistry , stereochemistry , catalysis , organic chemistry
Metal‐Containing Heterocycles: Preparation, Properties, Reactions, LXXVI. – Regioselective Cyclocotrimerization of a Thiophosphinito Unit with Methyl Propynoate The P = S function of (η 2 ‐PCy 2 =S)Mn(CO) 4 ( 1 ) undergoes a regiospecific cyclocotrimerization with methyl propynoate to give the bicyclic compound 3 . Oxidation of 3 with (NH 4 ) 2 [Ce(NO 3 ) 6 ] results in the formation of the thiophene 4 . Compound 3 was characterized on the basis of MS, IR, 31 P{ 1 H}‐, 1 H‐, 13 C{ 1 H}‐NMR spectra and with a 2D‐H,C‐COSY experiment.