Synthesis of 1,3-oxaphospholes via chromium mediated cyclization of carbenes, carbon monoxide, and phospha-alkynes

Metal-Assisted Cycloaddition Reactions in Organotransition Metal Chemistry

“…847,848 ] The palkoxyphenol ligand can be cleaved from the metal either by substitution by CO or by oxidation to the quinone. Several competent collecting and reviewing articles with many leading references have appeared.…”

The reactivity of acyl chlorides towards sodium phosphaethynolate, Na(OCP): a mechanistic case study

“…The PC and CO bond lengths of the P 2 C 2 O ring are comparable to those in other 1,3-oxaphospholes. 20 …”

Cycloaddition of Phosphaalkynes to High-Oxidation-State Metal Alkylidenes: Synthesis and Characterization of a Unique Phosphametallacyclobutene via an Alkoxide Ligand Shift

“…Spectroscopic detection of a 1-phospha-3-titanacyclobut-1-ene constitutes the only reported details of a “head-to-tail” phosphaalkyne cycloaddition to an unsaturated mononuclear organometallic compound 6c. Other reports of phosphaalkyne head-to-tail cycloaddition include details of the cycloaddition of 1 to a bridging methylidyne,6a mention of the isolation and characterization of the tungsten d 0 complex [ t -BuO] 2 ( t -Bu)CWC( t -Bu)P(O- t -Bu) with no supporting data, and the inferred formation of a cycloadduct in the tert -butylphosphaacetylene annelation with (alkoxynaphthylcarbene)chromium …”