Tian-Jie Wu

New Facile Synthesis of 2-Aryloxy-4H-Imidazolin-4-Ones Via Base Catalytic Reactions of Phenols with Functionalized Carbodiimides

Abstract The carbodiimides 2, obtained from aza-Wittig reactions of vinyliminophosphorane 1 with aromatic isocyanates, reacted with phenols in presence of catalytic potassium carbonate at 50-60°C to gave 5 in satisfactory yields.

A FACILE AND SELECTIVE SYNTHESIS OF 2-ALKYLAMINO-4H-IMIDAZOLIN-4-ONES

The carbodiimides 2, obtained from aza-Wittig reactions of vinylimino-phosphorane 1 with aromatic isocyanates, reacted with aliphatic primary amines to give mainly 2-alkylamino-4H-imidazolin-4-ones 4 with unusual selectivity.

A Facile Synthesis of 2-Mino-3H-Quinazolin-4-Ones with Tandem Aza-Wittig Reaction

Abstract 2-Amino-3H-quinazolin-4-ones 8 were prepared from tandem aza-Wittig reaction of iminophosphorane 5 with aromatic isocyanate and nucleaphilic reagent HY in mild condition.

Studies on the Wittig Reaction. XV. A Direct Preparation of ω-Unsaturated Bromides via Solid/Liquid Transferred Wittig Reactions of ω-Bromoalkyltriphenyl Phosphonium Salts with Aldehydes

Abstract A new approach to the synthesis of ω—unsaturated bromides was proposed using solid/liguid transferred Wittig reactions between ω—bromoalkyltripheny phosphonium Salt and aldehydes.

A FACILE SYNTHESIS OF DERIVATIVES OF 4-ARYL-1,3,2-DIOXAPHOSPHORINANE-2-SULFIDE VIA LAWESSON'S REAGENT

Abstract The derivatives of 4-aryl-1,3,2-dioxaphosphorinane-2-sulfide, namely, 4-aryl-5,5-dimethyl-1,3,2-dioxaphosphorinane-2-sulfides (6) were synthesized in moderate yields by the cyclization reaction of 1-aryl-2,2-dimethyl-1,3-propanediols(5) with Lawessons reagent using acetonitrile as a solvent. 8-Membered cyclic trithiopyrophosphonates (7) were isolated as side-products.

A novel route to spiro phosphorus-heterocycle via Lawesson's reagent

ABSTRACT 2-Aryl-spiro-[5,5]-1,3,2-dioxaphosphorinane-2-sufides were prepared by the cyclization reaction of Lawessons reagent with pentaerythritol and monobenzalpentaerythritol, respectively.

A Facile Synthesis of Fused Phosphorus-Heterocycle with Bioactivity via Lawesson's Reagent

A convenient one-pot synthesis of fused phosphorus-heterocycles with biological activity via the cyclization reactions of Lawessons reagent with bifunctional substrates is reported.

Synthesis and insecticidal activity of O-aryl O-(1,2,2,2-tetrachloroethyl)phosphoramidothioates and their thiophosphoric hydrazides [1]

O-Aryl O-(1,2,2,2-tetrachoroethyl)phos- phoramidothioates 3a–h and their thiophosphoric hydrazides 4a–e were synthesized by reactions of O-aryl O-(1,2,2,2-tetrachoroethyl)thiophosphorochloridates 2 with amines and hydrazines, respectively. Their structures were characterized by elemental analysis IR 1H NMR, 31P NMR, and MS. The O-aryl O-(1,2,2,2-tetrachloroethyl)thiophosphoric hydrazides 4a–d (R2=H) can be transformed into 1,3,4,2-oxadiazaphospholanes 5a–d by the reaction of triethylamine. The results of preliminary bioassays indicated that some of the title compounds have good insecticidal activities against nematodes (Meloidogyne spp.) and pea aphids.

STUDIES ON THE WITTIG REACTION (XXV): THE STEREOCHEMISTRY OF BIS-WITTIG REACTION BETWEEN AROMATIC ALDEHYDES AND 1,2 AND 1,3 BIS-YLIDES

Abstract 1,2 and 1,3 bis-ylides derived from corresponding bis-phosphonium salts reacted with substituted benzaldehydes to give 19 dienes with E,E-selectivity.

A CONVENIENT SYNTHESIS OF DERIVATIVES OF 1,3,2- DIOXAPHOSPHOCANE-2-SULFIDE WITH BIOACITIVITY VIA LAWESSON'S REAGENT

Lawessons reagent, 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disufide, reacted with the substituted 1,5-bisphenol 1 to afford derivatives of l,3,2-dioxaphosphocane-2-sulfide 2, which were found to possess selective herbicidal activity against rape.