22467-83-0

Upstream product

• 186581-53-3 diazomethane 
• 67521-83-9 4-(2-methoxycarbonyl-propenyl)-5,5-dimethyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid methyl ester 
• 497-95-0 (+/-)-3t-(3t-carboxy-2,2-dimethyl-cycloprop-r-yl)-2-methyl-acrylic acid 
• 112753-41-0 5-(2-Hydroxy-2-methoxycarbonyl-propyl)-3,3-dimethyl-3H-pyrazole-4-carboxylic acid methyl ester 
• 39653-64-0 (1S,3R)-3-(2-Hydroxy-2-methoxycarbonyl-propyl)-2,2-dimethyl-cyclopropanecarboxylic acid methyl ester 
• 113767-62-7 (1R,3S)-3-(2-Methoxycarbonyl-allyl)-2,2-dimethyl-cyclopropanecarboxylic acid methyl ester 
• 64198-08-9 dimethyl (E,E)-2-methyl-2,4-hexadienoate 
• 67521-82-8 4-(2-methoxycarbonyl-propenyl)-5,5-dimethyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid methyl ester 

Downstream Products

• 497-92-7 optically inactive cis-3-(2-methoxycarbonyl-cis-propenyl)-2,2-dimethyl-cyclopropanecarboxylic acid-(3-allyl-2-methyl-4-oxo-cyclopent-2-enyl ester) 

Relevant academic research and scientific papers

SYNTHESE STEREOSPECIFIQUE DE CIS-PYRETHROIDES PAR VOIE CYCLOPROPENIQUE UTILISANT UN SYNTHON CARBANIONIQUE. II. ACCES AUX DERIVES CIS-CHRYSANTHEMIQUES ET CIS-PYRETHRIQUES.

The photolysis of series of gem-dimethyl 4-carbomethoxy 3H-pyrazoles, obtained from a common carbanionic precursor (preceding article) leads to cyclopropenic esters.These can be hydrogenated to the corresponding cis-disubstituted cyclopropanes which are direct precursors of chrysanthemates, pyrethric esters and analogous halopyrethroids.