88422-79-1

Upstream product

• 98-88-4 benzoyl chloride 
• 253185-03-4 tert-butylbenzene 
• 582-61-6 benzoyl azide 
• 21404-94-4 2-methyl-2-phenyl-propylamine; hydrochloride 

Downstream Products

• 88422-89-3 4,4-dimethyl-1-phenyl-3,4-dihydroisoquinoline 

Relevant academic research and scientific papers

Copper-Catalyzed C(sp3)?H Amidation: Sterically Driven Primary and Secondary C?H Site-Selectivity

Undirected C(sp3)?H functionalization reactions often follow site-selectivity patterns that mirror the corresponding C?H bond dissociation energies (BDEs). This often results in the functionalization of weaker tertiary C?H bonds in the presence of stronger secondary and primary bonds. An important, contemporary challenge is the development of catalyst systems capable of selectively functionalizing stronger primary and secondary C?H bonds over tertiary and benzylic C?H sites. Herein, we report a Cu catalyst that exhibits a high degree of primary and secondary over tertiary C?H bond selectivity in the amidation of linear and cyclic hydrocarbons with aroyl azides ArC(O)N3. Mechanistic and DFT studies indicate that C?H amidation involves H-atom abstraction from R-H substrates by nitrene intermediates [Cu](κ2-N,O-NC(O)Ar) to provide carbon-based radicals R. and copper(II)amide intermediates [CuII]-NHC(O)Ar that subsequently capture radicals R. to form products R-NHC(O)Ar. These studies reveal important catalyst features required to achieve primary and secondary C?H amidation selectivity in the absence of directing groups.

(9H-fluoren-9-yl)methanesuIfonyl (Fms): An amino protecting group complementary to Fmoc

A sulfonamide-based protecting group (PG), (9H-fluoren-9yl)methanesulfonyl (Fms), which can be used in a similar way to the well-established Fmoc PG, was developed. The advantages of this new PG were demonstrated in the successful formation of a phosphonamide between an N-Fmsprotected a-phosphonoalanine monoester and secondary alkylamines, including (R)-2-phenylethylamine, (S)-phenylalanine iert-butyl ester (H-Phe-OtBu), H-Pro-Gly-OtBu, and H-Phe-Phe-OtBu, without formation of oxazaphospholine, which is a serious problem associated with the Fmoc PG. The success should pave the way to the solid-phase synthesis of unnatural peptides substituted with a-amino phosphonic acid (AP) at essentially any arbitrary position without significant modification of the Fmoc-based chemistry that has been accumulated since Carpino's report in 1970. The N-Fms-AP monomer would attract much attention in the field of peptide mimetics.

SUBSTITUTED 4-(1,2,3,4-TETRAHYDROISOQUINOLIN-2-YL)-4-OXORUTYRIC ACID AMIDE AS KCNQ2/3 MODULATORS

The invention relates to substituted tetrahydroisoquinolinyl-4-oxobutyric acid amides, methods for the preparation thereof, medicinal products containing these compounds and the use of these compounds for the preparation of medicinal products