444886-89-9

Upstream product

• 13984-49-1 (phenylethynyl)zinc chloride 
• 3757-88-8 tributylstannylethynylbenzene 
• 444886-85-5 (E)-methyl 2-bromo-5-phenylpent-2-en-4-ynoate 
• 208194-62-1 (2E)-ethyl 2-bromo-5-phenylpent-2-en-4-ynoate 

Downstream Products

• 60728-63-4 3-bromo-6-phenyl-pyran-2-one 
• 208194-66-5 (Z)-5-benzylidene-3-bromo-2,5-dihydrofuran-2-one 
• 444886-98-0 3-bromo-5-(1-hexynyl)-6-phenyl-2(2H)-pyranone 
• 444886-91-3 3-bromo-5-iodo-6-phenyl-2(2H)-pyranone 

Relevant academic research and scientific papers

Antifungal 3,5-disubstituted furanones: From 5-acyloxymethyl to 5-alkylidene derivatives

5-Acetoxymethyl-3-(4-bromophenyl)-2,5-dihydrofuran-2-one previously described as highly antifungally active was found to provide the corresponding 5-methylene derivative via an unusual DMSO-promoted elimination of the ester group at C5 under antifungal assay conditions. Since the latter possessed nearly the same antifungal effect as that originally reported for the former, the 5-acetoxymethyl furanone just served as a precursor of the actual antifungally active species. A few series of compounds with alkyloxy, aryloxy and alkylidene substituents at C5 of the parent furanone structure were therefore prepared and evaluated. In line with the ease of elimination of the substituent from C5, low activities of the 5-alkoxy compounds were observed. On the other hand, their 5-aryloxymethyl congeners were found to be capable of liberating the antifungally active 5-methylene furanone into the testing medium. The antifungal effect of the 5-alkylidene derivatives was highly sensitive to substitution of the alkylidene moiety; a substituent in the allylic position was necessary for a compound to retain high activity. Parallel evaluation of cytostatic activity showed moderate activities of the antifungally active derivatives against HeLa S3 and CCRF-CEM lines. Cell cycle analysis of CCRF-CEM cells following the treatment with 5-methylene-3-(4-bromophenyl)-2,5-dihydrofuran-2-one revealed that this compound is a necrotic agent.

Selective synthesis of 5,6-disubstituted 3-methyl-2(2H)-pyranones and 6-substituted 3-methyl-2(2H)-pyranones, including fusalanipyrone and gibepyrone A

The 6-substituted 3-bromo-5-iodo-2(2H)-pyranones 11, prepared by iodolactonization of the corresponding 5-substituted (E)-2-bromo-2-en-4-ynoic acids 10, were used as precursors to 5,6-disubstituted 3-methyl-2(2H)-pyranones 8 and 6-substituted 3-methyl-2(2

A novel protocol for the stereoselective synthesis of variously substituted (Z)-5-ylidene-5H-furan-2-ones

The Pd(II)- or Ag(I)-catalyzed lactonization of easily available (E)-4- (1-alkynyl)-2-bromopropenoic acids provides (Z)-3-bromo-5-ylidene-5H-furan- 2-ones, 5. These compounds, which represent an unpreviously reported class of (Z)-alkylidenebutenolides, are able to undergo Pd-catalyzed cross-coupling reactions with arylzinc halides, tetraalkylstannanes or alkenylstannanes to provide the corresponding 3-substituted (Z)-5-ylidene-5H-furan-2-ones, 1. The new procedure for the preparation of compounds 1 has been employed in a new synthesis of the butter flavour component bovolide.