نتایج جستجو برای: pyridine 2
تعداد نتایج: 2531185 فیلتر نتایج به سال:
The title compound, [Ni(C13H11N4S2)2], was obtained by the reaction of S-2-picolyldi-thio-carbazate and pyridine-2-carbaldehyde with nickel(II) acetate. The Ni(II) atom is located on a twofold rotation axis and is bonded to four N atoms at distances of 2.037 (8) and 2.109 (9) Å, and to two S atoms at a distance of 2.406 (3) Å, leading to a distorted octa-hedral coordination. The angle between t...
A facile synthesis of functionally substituted 2-(hetero)aryl 1,3-benzazaphospholes via nickel- or palladium-catalyzed phosphonylation of N-acyl-2-bromoanilides 1a-k with triethyl phosphite is presented. Anilidophosphonates 2a-g with naphthoyl-, o-substituted phenyl, furoyl- or thenoyl groups allow direct reductive cyclization with LiAlH(4) to benzazaphospholes 3. The reaction of the o-bromoder...
The most widely distributed substituted pyridine compounds in living systems are the pyridine nucleotides. The nicotinamide moiety (Fig. 1, I) of these compounds arises from the indole nucleus of tryptophan in animals, (1, 2) and Neurospora (3, 4), but not in higher plants (5-7) and certain bacteria (8). Pyridine compounds which might be used to study the biosynthesis of the pyridine nucleus ar...
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