Phosphorus heterocycles from 2‐(2‐hydroxyphenyl)‐1H‐benzimidazole

Abstract

Sixteen different P(III) and P(V) heterocycles derived from 2-(2-hydroxyphenyl)-1H-benzimidazole (1) are reported. In these heterocycles the phosphorus atom is part of a six-membered unsaturated ring. They were mainly studied by multinuclear NMR. The X-ray diffraction

Hypervalent triphenyl and diphenyl tin coordination compounds derived from 2-(1H-benzimidazol-2-yl)phenol

“…The ligand is a polyfunctional molecule suitable for the synthesis of structurally diverse coordination compounds which are influenced by the strong intramolecular hydrogen bond O-HÁ Á ÁN (HÁ Á ÁN distance is 1.63 Å) which affords a planar tetracyclic structure, as was found in solid state (Scheme 1) [21]. Previous preparation of phosphorus [22] and boron [23] heterocycles derived from 1 and the tris-chelate cobalt(III) complex obtained by bidentate coordination of 1 [21] suggest that the reaction of 1 with tin reagents could give the structures depicted in Scheme 2. However, their resulting derivatives, described in Schemes 3 and 5 were not the structures which had been expected as we will discussed later.…”

Phosphorus heterocycles from 2‐(2‐aminophenyl)‐1H‐benzimidazole

“…In the solid state, compound 1 exists as an almost planar molecule with a strong hydrogen bond. Phosphorus heterocycles derived from 2-(2-hydroxyphenyl)-1H-benzimidazole are reported in this journal [14].…”

Boron coordination compounds derived from 2-phenyl-benzimidazole and 2-phenyl-benzotriazole bidentate ligands

“…Derivatives of compound 5 and elements of group 4 have been employed as catalysing agents [17]. Compounds 1 and 2 have been used to prepare phosphorus heterocycles [18,19]. Haloboron heterocycles derived from compound 2 are known.…”