New deoxynojirimycin derivatives as potent inhibitors of intestinal α-glucohydrolases
摘要:
New N-alkyl, alkenyl and benzyl substituted DNJ derivatives incorporating a silicon atom in the substituent were synthesised. Kinetic parameters (K-i, t(1/2)) for inhibition of rat intestinal alpha-glucohydrolases as well as human lysosomal alpha-glucosidases were measured. New DNJ derivatives are potent and selective inhibitors of intestinal alpha-glucohydrolases. (C) 1997, Elsevier Science Ltd.
bond in three series of alkenylsilanes, R3Si·[CH2]n·CHCH2(R = Me, Ph, or Cl) toward addition by the trichloromethylradical have been determined, and the relative reactivities of vinyl- and allyltrimethylsilane toward free radicaladdition by n-dodecanethiol have been investigated. The factors influencing the reactivities of the various alkenylsilanes toward radicaladdition reagents are discussed.
Photo-inducedelectrontransfer reactions of tetraalkylsilanes, -germanes, and -stannanes with aromaticnitriles afforded alkylated products. The mechanism was investigated by use of a radical clock.
Rhodium(I) or iridium(I) catalyzed migration of double-bond has been successfully applied to the regiocontrolled synthesis of allylsilane from olefin silylated at a remote sp carbon.
Diverse Alkyl–Silyl Cross-Coupling via Homolysis of Unactivated C(sp<sup>3</sup>)–O Bonds with the Cooperation of Gold Nanoparticles and Amphoteric Zirconium Oxides
the degradation of polyesters and the synthesis of organosilanes were realized concurrently by the unique catalysis of supported gold nanoparticles. Mechanistic studies corroborated the notion that the generation of alkyl radicals is involved in C(sp3)–Si coupling and the cooperation of gold and an acid–base pair on ZrO2 is responsible for the homolysis of stable C(sp3)–O bonds. The high reusability and