98116-71-3

Upstream product

• 7354-47-4 (E)-2-butenyltriphenylphosphonium chloride 
• 39741-81-6 (E)-(but-2-en-1-yl)triphenylphosphonium bromide 
• 603-35-0 triphenylphosphine 

Downstream Products

• 131721-24-9 Benzoic acid (2Z,4E)-(S)-1-(3-ethoxycarbonyl-propyl)-6-oxo-hexa-2,4-dienyl ester 
• 94477-89-1 (1α,2β,6β)-6-Methyl-1,2-diphenyl-4-(triphenylphosphoranyliden)bicyclo<3.1.0>hexan-3-on 
• 88299-53-0 2,2,4-Trimethyl-6-(triphenylphosphoranyliden)-4-cyclohexen-1,3-dion 

Relevant academic research and scientific papers

Total synthesis of natural and ent-fredericamycin A

A total synthesis of both enantiomers of the potent antitumor-antibiotic fredericamycin A is detailed based on a room temperature inverse electron demand Diels-Alder reaction of a N-sulfonyl-1-aza-1,3-butadiene for assemblage of a pyridone F ring precurso

Synthesis and Reaction of (3-Phenylseleno-1-alkenyl)triphenylphosphonium Salts

The reaction of allylic triphenylphosphonium ylides with benzeneselenenyl bromide gave (3-phenylseleno-1-alkenyl)triphenylphosphonium salts in good yields.Oxidation of the salts produced α,β-unsaturated aldehydes.

Ene Reactions of Conjugated Dienes. 2. Dependence of Rate on Degree of Hydrogen Removed and s-Cis or s-Trans Diene Character

The rates of the ene reactions between diethyl diazenedicarboxylate and a number of dienes have been measured and product structures determined.Accelerated reactions are observed with 1,3-cyclohexadienes but not with dienes held fixed in the s-trans form.Within the first set of systems tertiary hydrogens are much more reactive than secondary.Within the second set secondary are (in turn) more reactive than primary.There is no apparent correlation between the rate of the Diels-Alder reaction of the 1,3-cyclohexadienes with maleic anhydride and the rate of ene reaction with the diazenedicarboxylate.

Reaction of Diphenylcyclopropenone with Allylidenetriphenylphosphoranes

Allylidenetriphenylphosphoranes 2 react with diphenylcyclopropenone (1) via a ring opening mechanism.While reaction of 2a and 2b yields the bicyclic phosphane 3 through the zwitterion 4 as intermediate, two equivalents of 2c react with 1 to produce the al