42226-36-8

Basic information

• Product Name: 1H-1,2,4-Diazaphosphole
• Synonyms: 1H-1,2,4-Diazaphosphole
• CAS NO: 42226-36-8
• Molecular Formula: C₂H₃N₂P
• Molecular Weight: 0
• Mol File: 42226-36-8.mol
• Article Data: 5

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1H-1,2,4-Diazaphosphole(CAS DataBase Reference)
• NIST Chemistry Reference: 1H-1,2,4-Diazaphosphole(42226-36-8)
• EPA Substance Registry System: 1H-1,2,4-Diazaphosphole(42226-36-8)

Safety Data

• Hazardous Substances Data: 42226-36-8(Hazardous Substances Data)

Upstream product

• 3724-43-4 Vilsmeier reagent 
• 2397-26-4 N,N-dimethyl(chlorophenylmethylene)ammonium chloride 
• 70310-50-8 t-butylchloromethylenedimethylammonium chloride 
• 93715-00-5 1,3-Bis(dimethylamino)-2-phosphaallyl chloride 
• 124489-74-3 3,5-Bis(trimethylsilyl)-1H-1,2,4-diazaphosphole 
• 186581-53-3 diazomethane 
• 6829-52-3 methylidynephosphine 

Relevant articles and documents

Improved Synthesis of Asymmetrical Substituted 1 H-1,2,4-Diazaphospholes

The reaction of tris(trimethylsilyl)phosphine and a mixture of two different N,N-dimethylalkylamides (1a,b), followed by the treatment with dry hydrazine in situ, resulted in seven asymmetrical 3,5-disubstituted 1H-1,2,4-diazaphospholes (3a-g). Compounds

Phosphorus Compounds with Unusual Coordination, 31. Cycloaddition of Diazo Compounds onto a P - Chloro-phosphaalkene

Chloro bis(trimethylsilyl)methylene phosphane (4) reacts with the diazo compounds 5, 10, 15 and 20 even at low temperatures with formation of the 3H-1,2,4-diazaphospholes 6, 11, 16 and 21.The products are unstable and decompose either with elimination of nitrogen to yield 1-chlorophosphiranes (9, 14, 19 and 22), or isomerize with aromatization (11-->13) or transformation into 4,5-dihydro-1,2,4-diazaphospholes (6-->8, 16-->18) by trimethylsilyl shifts.Silyl groups attached to ring nitrogen are easily hydrolized (8-->7, 13-->12, 18-->17), those attached to ring carbon are cleaved by treatment with potassium fluoride in dimethyl formamide (7-->23, 12-->24). - Keywords: Chloro-methylene Phosphanes, Diazo Compounds, 1,2,4-Diazaphospholes, 1-Chlorophosphiranes

1H-1,2,4-Diazaphosphole ueber 2-Phosphaallylchloride

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