In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 21461-84-7, name is (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid, introducing its new discovery. Recommanded Product: (S)-( )-5-Oxo-2-tetrahydrofurancarboxylic Acid
(Chemical Equation Presented) A stereocontrolled total synthesis of (+)-longicin, a representative of the class of mono-THF-acetogenins, is described. The strategy involves the utilization of D- and L-glutamic acids as chirons that correspond to two five-carbon segments harboring stereogenic centers at C4 and at C17 of the C32 polyketide-derived natural product. The use of Grubbs’ RCM reaction as a novel “chain elongation” strategy for the synthesis of acetogenin-type structures and a new protocol for butenolide incorporation are also described.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem