Site-Selective Cu-Catalyzed Alkylation of α-Amino Acids and Peptides toward the Assembly of Quaternary Centers
作者:Marcos San Segundo、Arkaitz Correa
DOI:10.1002/cssc.201802216
日期:2018.11.23
The CuI‐catalyzed selective α‐alkylation of α‐amino acid and peptide derivatives with 2‐alkyl‐1,3‐dioxolanes is reported. This oxidative coupling is distinguished by its site‐specificity, high diastereoselectivity, and chirality preservation and exhibits absolute chemoselectivity for N‐aryl glycine motifs over other amino acid units. Collectively, the method allows for the assembly of challenging quaternary
NANOFORMULATION OF MUSK-DERIVED BIOACTIVE INGREDIENTS FOR NANOCOSMETIC APPLICATIONS
申请人:Mousa Shaker A.
公开号:US20150223451A1
公开(公告)日:2015-08-13
The composition of the Nano carrier or Nano polymers composed of Hyaluronic Acid (15-25%) and fatty acids (50-70%) cross linked with ultra-Low molecular weight chitosan (15-25%) encapsulating isolated compounds from musk and their combinations for cosmetic use as anti-aging, anti-microbial, and fragrance. Additionally, these nano-encapsulated Musk bioactive compounds (MBC) at 0.1-10% (w/w MBC/Nano polymers) could be used in textile manufacturing (carpet/rugs and clothes) to provide anti-microbial and fragrance properties. Furthermore, Musk derived products are chemically conjugated to HA polymer, FA polymer, CH polymer, HA-CH co-polymer, FA-CH co-polymer or HA-CH-FA co-polymer to be incorporated into the fabric of the textile products (carpet/rugs or clothes).