Polyunsaturated fattyacids (PUFAs) such as docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), and arachidonic acid (ARA) are essential fattyacids for humans. Some microorganisms biosynthesize these PUFAs through PUFA synthases composed of four subunits with multiple catalytic domains. These PUFA synthases each create a specific PUFA without undesirable byproducts, even though the multiple catalytic domains
Cross coupling reactions of organozinc iodides with solid-supported electrophiles: synthesis of 4-substituted benzoic and 3-substituted (E)- and (Z)-propenoic acids and amides
作者:Leslie J. Oates、Richard F. W. Jackson、Michael H. Block
DOI:10.1039/b208632h
日期:2003.12.19
The solid-supported iodobenzoic acid derivatives 8–10 were coupled with a range of organozinc reagents 1–4 under palladium(0) catalysis. The coupled products released by acidic cleavage with TFA were obtained in high purities after recrystallisation. Analogous coupling of solid-supported (E)- and (Z)-3-iodoacrylic acids 18a, 18b, 19 and 20 gave (E)- and (Z)-α,β-unsaturated acids and amides 21–27 stereospecifically.
Palladiurn(<scp>0</scp>)-catalysed transfer hydrogenation of alkynes to cis-alkenes with HCO<sub>2</sub>H–NEt<sub>3</sub>
作者:Kousuke Tani、Naoya Ono、Sentaro Okamoto、Fumie Sato
DOI:10.1039/c39930000386
日期:——
Transfer hydrogenation of alkynes using HCO2HâNEt3 as a hydrogen donor in the presence of Pd0-catalyst proceeds highly stereoselecively to afford cis-alkenes in excellent yields, thus providing a practical method for conversion of alkynes to cis-alkenes.
[EN] METHOD AND COMPOSITION FOR WATER TREATMENT<br/>[FR] PROCÉDÉ ET COMPOSITION DE TRAITEMENT DE L'EAU
申请人:BROMINE COMPOUNDS LTD
公开号:WO2022118312A1
公开(公告)日:2022-06-09
The invention provides methods and compositions for the microbial control of water, in particular for eliminating planktonic and biofilm bacteria therefrom, using a bromine-based biocide in combination with a cis-2-alkenoic acid as an auxiliary agent which has been found to enhance the action of the biocide.