57787-10-7

Upstream product

• 39225-17-7 diethyl 4-chlorobenzylphosphonate 
• 209627-02-1 [Chloro-(4-chloro-phenyl)-trimethylsilanyl-methyl]-phosphonic acid diethyl ester 
• 104-83-6 1-Chloro-4-(chloromethyl)benzene 
• 108054-54-2 diethyl (4-chlorophenyl)(hydroxy)methylphosphonate 
• 421-83-0 trifluoromethane sulfonyl chloride 
• 108-18-9 diisopropylamine 
• 104-88-1 4-chlorobenzaldehyde 

Downstream Products

• 1181811-89-1 diethyl α,α-chlorofluoro-4-chlorobenzylphosphonate 

Relevant academic research and scientific papers

The first synthesis of diethyl α,α- chlorofluorobenzylphosphonates

Starting from a-hydroxyphosphonates, a wide variety of diethyl α,α-chlorofluorobenzylphosphonates have been obtained in pure form in a two-step procedure. The first step was chlorination of a- hydroxyphosphonates with Ph3P and CCl4,

Controlled monohalogenation of phosphonates: A new route to pure α- monohalogenated diethyl benzylphosphonates

Starting from diethyl benzylphosphonates, a wide variety of diethyl α- monofluoro, chloro, bromo and iodobenzylphosphonates have been obtained in pure form by a one-pot procedure. This high yielding method implies the intermediate protection of the benzyl anion with TMSCI followed by halogenation with an electrophilic halogenating reagent.

A highly selective synthesis of α-monofluoro- and α-monochloro- benzylphosphonates using eiectrophilic halogenation of benzylphosphonates carbanions

The selective electrophilic monofluorination and monochlorination of a wide variety of diethyl benzylphosphonates have been realized in a one-pot procedure. The monohalogenation was accomplished by intermediate of a benzylic carbanion protected with TMSCl

Ethynylbenzothiophene pesticides

Ethynylbenzothiophene compounds of the following formula are effective as pesticides. STR1 wherein R is selected from STR2 R1 is selected from hydrogen, halogen, lower alkyl, lower haloalkyl, and phenylethynyl; R2 is selected from hy

2-Substituted ethynyl thiophene pesticides

Thiophene derivatives of the following formula are effective as acaricdies: STR1 wherein A is selected from -phenylthienyl and -phenyl optionally carrying one or more substitutents selected from -lower alkyl, -lower alkoxy, -phenoxy, -hydroxy, -halogen, -lower haloalkyl, -phenylcarbonyl, -lower alkyl carbonyloxy, -lower alkyl sulfonyl, -lower alkyl sulfonyloxy, -amino, -lowr alkyl carboxamido, and -lower haloalkyl carboxamido; R4 is selected from -hydrogen and -lower alkyl; and R5 is selected from -thienyl optionally carrying one or more substituents selected from -lower alkyl, -phenylethynyl, -lower alkylthio, -lower haloalkyl carbonyl, and lower alkyl sulfoxy; or -phenyl optionally carrying one or more substituents selected from -lower alkyl and -lower alkoxy.

Preparation of styryl cyclopropane insecticide intermediates

Styryl-cyclopropane derivatives of the formula STR1 in which R9 represents independently of one another when n=2, halogen, cyano, nitro, or an optionally halogen-substituted alkyl, alkoxy, alkylthio or alkylenedioxy radical, n represents zero,