Metallaphotoredox-catalyzed C–H activation: regio-selective annulation of allenes with benzamide

نویسندگان

چکیده

We have developed an efficient annulation of benzamides with allenes using cobalt and photoredox dual catalysis under oxygen atmosphere. The transformation features alternative strategy for the regeneration a catalyst aid Eosin Y.

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Regio- and Stereoselective Oxysulfonylation of Allenes.

A highly regio- and stereoselective oxysulfonylation of allenes was developed that provided direct access to 2-sulfonyl allylic alcohols in good yields. By means of dioxygen activation, selective difunctionlization of allenes could be successfully achieved under mild metal-free conditions. Preliminary mechanistic investigation disclosed that this transformation probably goes through a radical p...

متن کامل

The synthesis of allenes by Cu(I)-catalyzed regio- and stereoselective reduction of propargylic carbonates with hydrosilanes.

Cu(I)-catalyzed anti-S(N)2'-type reduction of internal propargylic carbonates with hydrosilanes affords various di- and trisubstituted allenes with high regioselectivities; the reactions are compatible with functional groups and work efficiently for the synthesis of optically-active allenes.

متن کامل

Highly regio- and chemoselective [2 + 2 + 2] cycloaddition of 1,6-heptadiynes with allenes catalyzed by cobalt complexes.

The CoI2(PPh3)2/Zn system effectively catalyzes the [2 + 2 + 2] ene-diyne cycloaddition of 1,6-heptadiynes with allenes in a highly regio- and chemoselective fashion to yield substituted benzene derivatives in good to excellent yields.

متن کامل

Highly regio- and stereoselective nitro-oxoamination of mono-substituted allenes.

A highly regio- and stereoselective (up to 99/1) nitro-oxoamination reaction of mono-substituted allene occurs under mild conditions with readily available AgNO2 and a free radical trap TEMPO to form one C-N bond and one C-O bond in one step. Various functional groups and heterocycles could be tolerated in this conversion.

متن کامل

Palladium-catalyzed highly regio- and stereoselective addition of organoboronic acids to allenes in the presence of AcOH.

The Pd(0)-catalyzed regio- and stereoselective addition of organoboronic acids to allenes leads to stereodefined tri- or tetrasubstituted alkenes. Furthermore, this method shows high substitutent-loading capability and tolerance of various substitutents. A hydropalladation-Suzuki coupling mechanism, which may account for the regio- and stereoselectivity, is proposed.

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

ژورنال

عنوان ژورنال: Organic chemistry frontiers

سال: 2021

ISSN: ['2052-4110', '2052-4129']

DOI: https://doi.org/10.1039/d0qo01127d