808753-29-9

Upstream product

• 444807-46-9 2-(4-(aminomethyl)phenyl)acetic acid methyl ester 
• 98-09-9 benzenesulfonyl chloride 
• 52798-01-3 methyl 4-cyanobenzeneacetate 
• 41841-16-1 (4-bromo-phenyl)-acetic acid methyl ester 
• 1878-68-8 2-(4-bromophenyl)-acetic acid 
• 99075-25-9 (4-aminomethylphenyl)-acetic acid methyl ester hydrochloride 

Downstream Products

• 59793-29-2 methyl 2-(1,1'-biphenyl-4-yl)acetate 
• 79094-42-1 [4-(benzenesulfonylamino-methyl)-phenyl]-acetic acid 

Relevant academic research and scientific papers

METHOD FOR THE METAL-FREE PREPARATION OF A BIARYL BY A PHOTOSPLICING REACTION AND THEIR USES

The present invention relates to a method for the metal-free preparation of a biaryl compound by a photosplicing reaction and its use in the preparation of chemical compounds, preferably of active ingredients e.g. in the fields of pharmaceuticals and agrochemicals. In particular, it refers to a method for the regiocontrolled preparation of a biaryl compound of formula (I): Ar-Ar' by photochemically reacting a precursor compound of formula (II): Ar-L-Ar' to form a biaryl compound of general formula: Ar-L-Ar' (II) → Ar-Ar' (I) wherein Ar and Ar', independently of each other, represent an unsubstituted or substituted C6-C20 aryl group or a heteroaryl group with 5–20 ring atoms selected from carbon, nitrogen, oxygen and sulfur, and L represents a group –X–Y–Z– as defined herein. The biaryl compounds are generally suitable as intermediates or key building blocks in a very broad spectrum of organic chemical syntheses and their respective utilities. Their use within the field of synthesis of active ingredients is an aspect of the invention, and their use in the preparation of pharmaceutically active ingredients is particularly preferred.

Metal-Free Synthesis of Pharmaceutically Important Biaryls by Photosplicing

Many pharmaceuticals feature biaryl motifs that are crucial for their binding to the target. Yet, benchmark methods for selective cross-couplings rely on highly toxic heavy metal catalysts, which are unfavorable in the synthesis of pharmaceuticals. Metal-free coupling reactions, on the other hand, may require harsh conditions and lack selectivity. We report a novel, metal-free cross-coupling reaction that involves the tethering of two phenyl groups by a temporary, traceless sulfonamide linker that directs a photochemical aryl fusion into a single coupling product. The perfect regio- and chemoselectivity of the reaction could be rationalized by a cyclic intermediate, which fragments into the biaryl and volatile side products. Using a flow reactor, we synthesized numerous substituted biaryl building blocks for important therapeutics in high yields, such as antibiotics, antitumor, neuroprotective and cholesterol-lowering agents as well as antiarthritic non-steroidal antiinflammatory drugs (NSAIDs). The new method was successfully employed in a total synthesis of cannabinol, an important analgesic and antiemetic therapeutic. We also report a metal-free synthesis of key building blocks used for the preparation of sartans, antihypertensive agents that rank among the top blockbuster drugs worldwide. This safe and convenient protocol is a valuable alternative for the widely used metal-dependent aryl cross-coupling methods.

Arylacetamide κ opioid receptor agonists with reduced cytochrome P450 2D6 inhibitory activity

Some κ opioid receptor agonists of the arylacetamide class, for example, ICI 199441 (1), were found to strongly inhibit the activity of cytochrome P450 2D6 (CYP2D6) (1: CYP2D6 IC50 = 26 nM). Certain analogs bearing a substituted sulfonylamino group, for example, 13, were discovered to have significantly reduced CYP2D6 inhibitory activity (13: CYP2D6 IC50 > 10 μM) while displaying high affinity toward the cloned human κ opioid receptor, good κ/δ and κ/μ selectivity, and potent in vitro and in vivo agonist activity.