Reported herein is a palladium-catalyzed secondary benzylic imidoylative Negishi reaction leveraging the sterically bulky aromatic isocyanides as the imine source. This method allows the facile access of alkyl-, (hetero)aryl-, and alkynylzinc reagents to afford various α-substituted phenylacetone products under mild acidic hydrolysis, which are ubiquitous motifs in many pharmaceuticals and biologically
Redox-Neutral Ni-Catalyzed sp<sup>3</sup> C–H Alkylation of α-Olefins with Unactivated Alkyl Bromides
作者:Mikkel B. Buendia、Bradley Higginson、Søren Kegnæs、Søren Kramer、Ruben Martin
DOI:10.1021/acscatal.2c01057
日期:2022.4.1
A light-induced redox-neutral Ni-catalyzed sp3 C–H alkylation of unactivatedalkenes with alkyl bromides possessing β-hydrogens is described herein. The method is distinguished by its simplicity, wide scope, and exquisite regio- and chemoselectivity profile, thus offering an entry point to forge sp3–sp3 architectures.
Cycloalkane aldehydes, method for preparing same, and use thereof in the perfume industry
申请人:V. Mane Fils
公开号:US09051531B2
公开(公告)日:2015-06-09
The invention relates to a compound of general formula I represented below:
wherein:
R1, R2 and R3 each independently represent a hydrogen atom or saturated or unsaturated, branched or non-branched C1 to C5 alkyl group;
m is an integer between 1 and 4;
n is an integer between 2 and 4;
characterized in that the ring is saturated and comprises from 5 to 8 carbons, that the total number of carbons of the ring and of the radicals R1, R2 and R3 is between 7 and 11
and it being understood that said compound of formula (I) is not:
6-cycloheptylidenehexanal
4-(4-methylcyclohexylidene)-butanal
4-(4-tert-butylcyclohexylidene)-butanal
4-(3,3,5-trimethylcyclohexylidene)-butanal
as well as a method of synthesizing said compounds, and their uses in perfumery.
Chemoselective Syntheses of Various Cyanofluoromethylene Compounds from Organic Bromides by Use of Sodium Triethylgermanate(IV) and Its Mechanistic Studies
作者:Yasuo Yokoyama、Kunio Mochida
DOI:10.1055/s-1999-3438
日期:1999.4
The chemoselective syntheses of various cyanofluoromethylene compounds proceeded through the formation of the cyanofluoromethyl anion from 2-fluoro-2-phenyl-2-phenyl-thioacetonitrile by the use of sodium triethylgermanate(IV) (Et3GeNa).
The firsttotalsynthesis of neuritogenic gangliosideGAA-7 was achieved using the glucosyl ceramide (Glc-Cer) cassette approach. The stereocenter triad within the ceramide moiety of the target molecule was efficiently established from Dlyxose. The assembly of the ceramide moiety was followed by glycosylation with glucosyl donors to give Glc-Cer cassettes, which underwent conjugation with the oligosaccha