Adsorption of pyrrole derivatives in alkali metal cation-exchanged faujasites: comparative studies by surface vibrational techniques, X-ray diffraction and temperature-programmed desorption augmented with theoretical studies Part I. Pyrrole as probe molecule
Organocatalytic Enantioselective Aza-Friedel-Crafts Reaction of Cyclic Ketimines with Pyrroles using Imidazolinephosphoric Acid Catalysts
作者:Shuichi Nakamura、Nazumi Matsuda、Mutsuyo Ohara
DOI:10.1002/chem.201601573
日期:2016.7.4
Organocatalytic enantioselective aza‐Friedel–Crafts reactions of cyclic ketimines with pyrroles or indoles were catalyzed by imidazoline/phosphoric acidcatalysts. The reaction was applied to various 3H‐indol‐3‐ones to afford products in excellent yields and enantioselectivities. The chiral catalysts can be recovered by a single separation step using column chromatography and are reusable without further
The Preparation of Several Deuterium Derivatives of Pyrrole
作者:Foil A. Miller
DOI:10.1021/ja01259a015
日期:1942.7
Ruthenium(II)-Mediated Carbon−Carbon Bond Formation between Acetonitrile and Pyrrole: Combined Experimental and Computational Study
作者:Karl A. Pittard、Thomas R. Cundari、T. Brent Gunnoe、Cynthia S. Day、Jeffrey L. Petersen
DOI:10.1021/om0506668
日期:2005.10.1
The reaction of TpRu(CO)(NCMe)(Me) (1) and pyrrole forms TpRu(CO)kappa(2) -N,N-(H)N= C(Me)(NC4H3)} (2). The formation of complex 2 involves the cleavage of the N-H bond and 2-position C-H bonds of pyrrole as well as a C-C bond forming step between pyrrole and the acetonitrile ligand of 1. Mechanistic studies indicate that the most likely reaction pathway involves initial metal-mediated N-H activation of pyrrole to produce TpRu.(CO)(N-pyrrolyl)(NCMe) (3) followed by C-C bond formation and proton transfer. Complex 3 has been independently prepared and demonstrated to convert to 2. Computational studies support the suggested selectivity for initial N-H bond cleavage in preference to C-H bond activation.
Microwave Determination of the Structure of Pyrrole
A number of deuterated pyrroles have been prepared and their microwave spectra recorded. For each isotopic species the two 1→2 transitions observable around 20 000 MHz were localized together with a number of Q-lines in the 17 400—26 000 MHz region scanned. For all isotopic molecules rotational constants were calculated. In this way seven mutually independent numerical data were obtained which is insufficient for a direct calculation of the nine geometrical parameters of pyrrole. Additional assumptions as to the length of the two C, H bonds lead to definite models for pyrrole.