Palladium-catalyzed decarboxylative cross-coupling of alkynyl carboxylic acids with arylboronic acids.
نویسندگان
چکیده
A highly efficient and mild palladium-catalyzed decarboxylative cross-coupling of aryl boronic acids and alkynyl carboxylic acids for the synthesis of unsymmetrical substituted alkynes is described for the first time.
منابع مشابه
Transition Metal-Catalyzed Decarboxylative Coupling Reactions of Alkynyl Carboxylic Acids
The decarboxylative couplings of alkynyl carboxylic acids are an attractive area of research in organic chemistry, because the structure of aryl alkyne is one of the important building blocks for the synthesis of p-conjugated compounds. The use of alkynyl carboxylic acid as an alkyne source has several advantages in handling and storage. As a catalyst, palladium, copper, nickel, and silver were...
متن کاملCopper-catalyzed decarboxylative cross-coupling of alkynyl carboxylic acids with aryl halides.
The copper-catalyzed decarboxylative reactions of alkynyl carboxylic acids with aryl halides were performed under relatively mild reaction conditions. Benzofurans could be further prepared smoothly by a one-pot domino protocol on the basis of decarboxylative cross-coupling of 2-iodophenol.
متن کاملPalladacycle-catalyzed decarboxylative coupling of alkynyl carboxylic acids with aryl chlorides under air.
A highly efficient and practical protocol for palladacycle-catalyzed decarboxylative coupling of alkynyl carboxylic acids with aryl chlorides was developed. The reaction could proceed smoothly in air within 3 h under optimized reaction conditions (1 mol % of palladacycle, 4 mol % of Xphos, 2.0 equiv of K2CO3 in xylene/H2O), affording the corresponding internal alkynes in mostly good to excellen...
متن کاملHighly effective copper-catalyzed decarboxylative coupling of aryl halides with alkynyl carboxylic acids.
We have developed a highly effective copper-catalyzed decarboxylative coupling of alkynylcarboxylic acids with various aryl and alkyl halides at 2 mol% loading of copper. This method is simple, economical and practical for the synthesis of disubstituted alkyne compounds.
متن کاملCopper-catalyzed ring expansion of 2-aminobenzothiazoles with alkynyl carboxylic acids to 1,4-benzothiazines.
A new ring expansion of 2-aminobenzothiazoles with alkynyl carboxylic acids was developed, which allows for one-pot synthesis of 1,4-benzothiazines in moderate to excellent yields. The cascade reaction was achieved through decarboxylative coupling, nucleophilic ring-opening reaction and intramolecular hydroamination process.
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemical communications
دوره 46 26 شماره
صفحات -
تاریخ انتشار 2010