90266-00-5

Upstream product

• 186581-53-3 diazomethane 
• 85829-29-4 3-(2-methylphenyl)propionic acid chloride 
• 22084-89-5 3-(2-methylphenyl)propanoic acid 

Downstream Products

• 4242-15-3 5-methyl-2-tetralone 
• 365554-24-1 2-amino-5-methyl-1,2,3,4-tetrahydro-naphthalene-2-carboxylic acid 
• 31701-18-5 8-Methyl-2-tetralone 

Relevant academic research and scientific papers

Structure-activity relationship of linear peptide Bu-His-DPhe-Arg-Trp-Gly-NH2 at the human melanocortin-1 and -4 receptors: Histidine substitution

Systematic substitution of His6 residue using non-selective hMC4R pentapeptide agonist (Bu-His6-DPhe7-Arg8-Trp9-Gly 10-NH2) as the template led to the identification of Bu-Atcsu

Selective cyclic peptides with melanocortin-4 receptor (MC4-R) agonist activity

Peptides cyclized via disulfide or lactam bridges having melanocortin-4 receptor (MC4-R) agonist activity useful for treatment of obesity.

Selective linear peptides with melanocortin-4 receptor (MC4-R) agonist activity

Peptides of formulae I, II and III selectively activate melanocortin-4 (MC-4) receptor activity.

The Intramolecular Buchner Reaction of Aryl Diazoketones. Substituent Effects and Scope in Synthesis

Rhodium(II) acetate-catalysed cyclisation of α-diazoketones derived from 3-arylpropionic acid produces bicyclodecatrienones or 2-tetralones depending on the substitution pattern of the aryl ring in the precursor; the former products are transformed into the latter catalytically with trifluoroacetic acid.Precursors with methyl, methoxy, and acetoxy substituents have been examined, efficient cyclisation occurring in all cases.When the precursor contains a meta-methoxy substituent, 2-tetralones are obtained directly.The efficient conversion of 3-phenylpropionicacid into trans-1-methylbicyclodecan-2-one is also described, partial asymmetric synthesis having been realised through the use of rhodium (S)-mandelate as the cyclisation catalyst.Cyclisations of diazoketones derived from 4-phenylbutyric acid and 5-phenylpentanoic acid have also been studied; the former provides a new entry into the bicycloundecane system whereas the latter produces a 2,3-disubstituted cyclopentanone via C-H insertion.Aspects of the cycloheptatriene-norcaradiene equilibrium in fused ring systems are discussed.

Efficient Synthesis of Bicyclodecatrienones and of 2-Tetralones via Rhodium(II) Acetate-catalysed Cyclisation of α-Diazoketones derived from 3-Arylpropionic Acids

Rhodium(II) acetate-catalysed cyclisation of α-diazoketones derived from 3-arylpropionic acids produces bicyclodecatrienones or 2-tetralones depending on the substitution pattern of the aryl ring; the former products are transformed into the latter by catalytic amounts of trifluoroacetic acid.

REGIOSPECIFIC SYNTHESIS OF α-(PHENYLTHIO)CYCLOALKENONES AND OF α-PHENYL-α-(PHENYLTHIO)KETONES VIA αα-ADDITION OF PHENYLSULPHENYL CHLORIDE TO α-DIAZOKETONES

Cyclic α-diazoketones react with phenylsulphenyl chloride at room temperature to furnish α-chloro-α-(phenylthio)cycloalkanones which undergo ready dehydrochlorination to α-(phenylthio)cycloalkenones when treated with triethylamine; acyclic, terminal α-diazoketones also furnish α-chloro-α-(phenylthio)adducts which are useful electrophiles in the synthesis of α-phenyl-α-(phenylthio)ketones.