Palladium(II)-catalyzed direct alkenylation of dihydropyranones.

نویسندگان

  • Shanshan Chen
  • Xihao Chang
  • Yu Tao
  • Haoming Chen
  • Yong Xia
چکیده

A palladium(II)-catalyzed direct alkenylation reaction of dihydropyranones was developed. Various substituted dihydropyranones could afford the desired products in reasonable yields. And different acrylates were found to be good coupling partners in this coupling reaction. A Pd(0)/Pd(II) catalytic pathway was proposed to be involved in this coupling reaction.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Palladium-catalyzed direct C-3 oxidative alkenylation of phosphachromones.

A method for the synthesis of C-3 alkenylated phosphachromones was developed using a direct intermolecular C-3 alkenylation with activated and non-activated alkenes through C-H activation under aerobic conditions.

متن کامل

Palladium-catalyzed ortho-C-H alkenylation of 2-benzyl-1,2,3-triazoles.

A mild and efficient method for the direct alkenylation of 2-benzyl-1,2,3-triazoles via Pd-catalyzed C-H bond activation was developed. This protocol was compatible with various substrates and gave the corresponding products in good to excellent yields. Thus, the present study provides a novel and valuable method for the synthesis of 2-benzyl-1,2,3-triazole derivatives.

متن کامل

Synthesis of 2-Cyclopentenone Derivatives via Palladium-Catalyzed Intramolecular Carbonyl α-Alkenylation.

2-Cyclopentenone derivatives have been efficiently synthesized from 5-bromo-5-hexen-2-ones via palladium-catalyzed intramolecular carbonyl α-alkenylation followed by double-bond migration under mild reaction conditions.

متن کامل

Ligand-assisted palladium-catalyzed C–H alkenylation of aliphatic amines for the synthesis of functionalized pyrrolidines

The development of a ligand-assisted Pd-catalyzed C–H alkenylation of aliphatic amines is reported. Our studies indicated that an amino-acid-derived ligand renders the C–H bond activation step reversible and promotes the traditionally difficult alkenylation process. The C(sp)–H alkenylation proceeds through a 5-membered-ring cyclopalladation pathway that allows access to complex aliphatic heter...

متن کامل

Palladium-catalyzed olefination and arylation of 2-substituted 1,2,3-triazole N-oxides.

Two highly efficient protocols for the regioselective synthesis of 2-substituted 4-alkenyl- and 4-aryl-1,2,3-triazoles by the palladium-catalyzed C-H functionalization of 1,2,3-triazole N-oxides are reported. A possible pathway of direct alkenylation with 1-octene and vinyl acetate is discussed.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Organic & biomolecular chemistry

دوره 13 43  شماره 

صفحات  -

تاریخ انتشار 2015