Reference

Synthesis of novel 2-alkoxy-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-carbonitriles

Synthesis of novel 2-alkoxy-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-carbonitriles. Girgis, Adel S.; Ahmed-Farag, I. S. (Pesticide Chemistry Dept., National Research Centre, Dokki, Cairo, Egypt). Zeitschrift fuer Naturforschung, B: Chemical Sciences, 58(7), 698-703 (English) 2003 Verlag der Zeitschrift fuer Naturforschung. CODEN: ZNBSEN. ISSN: 0932-0776. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 75 Reaction of 6-arylmethylene-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ones with malononitrile in the appropriate alc. in the presence of sodium afforded the corresponding 2-alkoxy-4-aryl-6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-c arbonitriles I (R = Ph, 4-ClC6H4, 4-FC6H4, 4-MeC6H4, 4-MeOC6H4, 2-thienyl; R1 = Me, Et) and not their isomeric forms 2-alkoxy-4-aryl-6,7-dihydro-5H-benzo[3,4]cyclohepta[1,2-c] pyridine-1-carbonitriles. The proposed structure was confirmed via independent synthesis of I through the reaction of 6,7,8,9-tetrahydro-5-benzocycloheptenone with the appropriate ylidenemalononitriles under the same reaction conditions. 3041-40-5 and 112934-66-4 which are cas registry numbers are also used here. Single crystal X-ray diffraction proves the structures of I (R = Ph; R1 = Me) [triclinic, P-1, a 8.5304(9), b 10.6606(12), c 11.1034(14)?, V 856.6(2) ?3, Z 2] and I (R = Ph; R1 = Et) [monoclinic, P21/c, a 13.3696(9), b 11.5674(8), c 19.5101(11)?, V 1841.0(2) ?3, Z 4]. .

Synthesis and characterization of a new polyquinone exhibiting a two-electron, single-wave reduction

Synthesis and characterization of a new polyquinone exhibiting a two-electron, single-wave reduction. Wellman, Daniel E.; West, Robert (Dep. Chem., Univ. Wisconsin, Madison, WI 53706, USA). J. Am. Chem. Soc., 106(2), 355-60 (English) 1984. CODEN: JACSAT.In this article, certain chemicals are used. Some of their cas registry numbers are 88000-82-2 and 3041-40-5 ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 72 Two dicyanomethylidene-substituted quinocyclopropenes I (R = H or R2 = benzo) were synthesized and studied. Oxidn. of I (R = H) produced only decompn. products but oxidn. of I (R2 = benzo) yielded the new polyquinone II. Compd. II was studied by cyclic voltammetry in aprotic media; it is unique among polyquinones in undergoing two-electron redn. within a single voltammetric wave, with E1 = 0.00 V and E2 = -0.04 V vs. SCE. .