A Boron Analogue of Furan. The Synthesis and Coordination Chemistry of 2-Substituted-1,2-Oxaborolides

Abstract

Two general methods have been developed for the synthesis of alkali metal salts of 2-substituted-1,2-oxaborolides (6). 2-Phenyl-1,2-oxaborolide (6b) has been converted to RuCp* complex 11b and to Mn(CO)3 complex 12b, in which the metals are η5-bound to the ligand.

Aromatic Borataheterocycles: Surrogates for Cyclopentadienyl in Transition-Metal Complexes

“…2-Substituted 1,2-oxaborolyls have been prepared by two routes, which are outlined in Scheme . (Allyloxy)(diisopropylamino)vinylborane ( 36 ) was prepared in 87% yield from 30 by treatment with lithium allyloxide.…”

Construction of Boron-Containing Aromatic Heterocycles

“…Compared with the intensive studies on the 1,2-azaborolides, few examples of 1,2-oxaborolides have been reported. 92 In 2004, the Ashe group reported two major synthetic routes to 1,2-oxaborolides (Scheme 52). The precursor 174 was formed by ring-closing metathesis of 172 with Grubbs catalyst.…”

3 Boron

“…125 127 The oxyborolaide complexes [Cp*Ru{Ph-BOC 3 H 3 }] and [(CO) 3 Mn{Ph-BOC 3 H 3 }], in which the oxyborolaide ligand is bound the metal centre in a g 5 -fashion, have been synthesised and the molecular structures determined. 128 The synthesis of 1,2-dichloro-1,2-diboralane and its use in the synthesis of a new series of aromatic tetraboranes, and triboracyclopropanates has been described. 129 The reactivity of the decamethyl diboraruthenocene, [Cp*Ru(g 5 -(CMe) 3 (BMe) 2 ], towards S 8 , COS, CS 2 , PC t Bu and PH 2 R (R = Ph & H) has been investigated and the reaction product described.…”