Ring Expansion Reactions of Electron-Rich Boron-Containing Heterocycles
نویسندگان
چکیده
منابع مشابه
Selective Ru(0)-catalyzed deuteration of electron-rich and electron-poor nitrogen-containing heterocycles.
A highly selective Ru(3)(CO)(12)-catalyzed deuteration method using t-BuOD as deuterium source is reported. Electron-rich and electron-poor N-heteroarenes such as indoles, azaindoles, deazapurines, benzimidazole, quinolines, isoquinolines, and pyridines were efficiently deuterated at specific positions with high selectivity; in most cases, deuterium incorporation was close to the theoretically ...
متن کاملRing-contraction vs ring-expansion reactions of spiro-cyclopropanecarboxylated sugars.
Electrophilic ring opening of spiro-cyclopropanecarboxylated sugars followed by reaction with DBU revealed interesting ring-contraction and ring-expansion reactions depending on the substrate and the kind of hydroxyl protective group present adjacent to the spiro center. A stereoselective method for accessing a new class of carbon chain extended keto-furanoses and C-glycosylated bicyclic compou...
متن کاملCross sections for electron collision with five-membered ring heterocycles
The absolute total cross-section (TCS) for electron scattering from isoxasole, (CH)3NO, molecule has been measured using the linear transmission technique for impact energies ranging from 1 to 400 eV. The measured TCS energy dependence appears typical for highly polar targets; over whole energy range applied, the magnitude of TCS generally decreases as the energy increases. Some narrow features...
متن کاملRegioselective ring-opening/cross-metathesis reactions of norbornene derivatives with electron-rich olefins.
This manuscript describes facile ring-opening/cross-metathesis (ROCM) reactions between unsymmetrical norbornene derivatives and electron-rich olefins in the presence of the second-generation Grubbs' catalyst to generate highly substituted furans and pyrroles.
متن کاملExtremely Electron-Rich, Boron-Functionalized, Icosahedral Carborane-Based Phosphinoboranes.
We have prepared the first examples of B9-connected trivalent aryl and alkyl phosphinoborane species via Pd-catalyzed phosphination of 9-iodo-meta-carborane. Our studies highlight the unique electronic features of the B9-connected meta-carboranyl moiety as compared to its C1-based analogue. This work suggests that the B9-functionalized meta-carboranyl substituent in these ligands exhibits more ...
متن کاملذخیره 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: Organometallics
سال: 2015
ISSN: 0276-7333,1520-6041
DOI: 10.1021/acs.organomet.5b00390