Naoki Inamoto

Isolation and characterization of some very stable 1-phospha-allenes: sterically protected iminomethylene- and ethenylidenephosphines

Abstract Very stable iminomethylenephosphine (3) and ethenylidenephosphine (4) were obtained by steric protection with the 2,4,6-tri-tertbutylphenyl group and some of the spectroscopic data are described.

Photoisomerization of benzylidenephosphine containing phosphorus in low coordination state

Abstract E -Benzylidene- P -2,4,6-tri- t -butylphenylphosphine containing phosphorus in low coordination state was irradiated to give the corresponding Z -isomer: both isomers were isolated and characterized and the reactions with chromium(O) carbonyls were described.

Synthesis and structures of E- and Z-phosphaethylenes

Abstract The X-ray analyses of sterically protected E- and Z-2-phenyl-1-(2,4,6-tri-t-butylphenyl) phosphaethylenes (E-1 and Z-1) were carried out and the structures in the crystal are discussed.

A convenient new route from diphosphene to 1,3-diphospha-allene and dynamic NMR studies of the 2,4,6-tri-t-butylphenyl derivative

Abstract Addition of dihalocarbenes to a diphosphene gave diphosphiranes which undergo rearrangement on treatment with alkyllithium reagents to afford 1,3-diphospha-allene; dynamic NMR studies on the allene are described.

Thermal reactions of (2,4,6-tri-butylphenyl)phosphonous dichloride and its derivatives; formation of 2,3-dihydro-1h-phosphinodes

Abstract 2,3-Dihydro-1H-phosphindole derivatives were obtained from thermal reactions of (2,4,6-tri-tert-butylphenyl)phosphonous dichloride in refluxing toluene, probably through cyclization involving phosphorus radicals with an adjacent methyl of o-tert-butyl groups.

Isolation and characterisation of the first stable diphospha-allene: P,P′-bis(2,4,6-tri-t-butylphenyl)-1,3-diphospha-allene

The diphospha-allene, P,P′bis(2,4,6-tri-butylphenyl)-1,3-diphospha-allene (3), was isolated and characterised as a stable compound for the first time.

Preparation and characterization of sterically protected primary phosphine sulfide and oxide

Abstract Sterically protected primary phosphine sulfide ( 1 ) and oxide ( 3 ), were prepared from 2,4,6-tri- tert -butylphenylphosphine ( 2 ) and were characterized as stable compounds.

The first x-ray structure determination of a z-phosphaethylene: z-2-phenyl-1-(2,4,6-tri-t-butylphenyl)phosphaethylene

Abstract The sterically protected Z -phosphaethylene, Z -2-phenyl-1-(2,4,6-tri-t-butylphenyl)phosphaethylene ( 1-Z ), was analyzed by X-ray crystallography.

Thermal and photochemical reactions of a stable thiobenzaldehyde, 2,4,6-tri-t-butylthiobenzaldehyde

Abstract Thermal and photochemical reactions of the title compound gave benzothiolane 2 in high yield; the reaction with free radicals also afforded 2 along with some other products.

A versatile preparation of 2,6-Di-t-butylbromobenzene. Application to steric protection for organophosphorus compounds in low coordination states

Abstract 2,6-Di-t-butylbromobenzene ( 5 ) was prepared from 2,4,6-tri-t-butyl-bromobenzene by ipso nitration followed by reduction of the nitro group and deamination. The diphosphene ( 8 ) and 1,3-diphosphaallene ( 10 ) were prepared.