here for the first time are the developments of an efficient method for oxidativecleavage of carbon−carbon double bonds yielding carbonyl compounds by using aryl-λ3-iodanes, which involve a combination of iodosylbenzene and HBF4 in the presence of water. The method serves as a safety alternative to ozonolysis. The oxidativecleavage of olefins probably involves the hitherto unknown direct vicinal dihydroxylations
Synthesis of an aromatic sesquiterpene, (±)-cuparene,via construction of a quaternary carbon centre by an intramolecular carbenoid displacement reaction
The synthesis of (±)-cuparene (11), which includes as the key step an intramolecularcarbenoiddisplacementreaction at the benzylic position of a benzyl sulphide derivative, is described.
The asymmetric ketone-tert-butanesulfinyl (t-BS) imine pinacol-type reductive coupling promoted by SmI2 is described. Trans-1,2-vicinal amino alcohols were formed predominantly in excellent er and high dr. The stereochemical outcome provided evidence for a radical mechanism for SmI2-induced reductive couplings of t-BS imines.
KAMETANI, TETSUJI;KAWAMURA, KUNIAKI;TSUBUKI, MASAYOSHI;HONDA, TOSHIO, J. CHEM. SOC. PERKIN TRANS.,(1988) N 2, 193-199