39701-08-1Relevant articles and documents
Iridium-Catalyzed C(sp3)?H Addition of Methyl Ethers across Intramolecular Carbon–Carbon Double Bonds Giving 2,3-Dihydrobenzofurans
Ohmura, Toshimichi,Kusaka, Satoshi,Torigoe, Takeru,Suginome, Michinori
, p. 4448 - 4453 (2019/09/16)
Intramolecular addition of an O-methyl C(sp3)?H bond across a carbon-carbon double bond occurs in the iridium-catalyzed reaction of methyl 2-(propen-2-yl)phenyl ethers. The Ir/(S)-DTBM-SEGPHOS catalyst promotes the reaction efficiently in toluene at 110–135 °C to afford 3,3-dimethyl-2,3-dihydrobenzofurans. Enantioselective C(sp3)?H addition is achieved in the reaction of methyl 2-(1-siloxyethenyl)phenyl ethers, affording enantioenriched 3-hydroxy-2,3-dihydrobenzofuran derivatives with up to 96% ee. (Figure presented.).
Facile synthesis of (±)-parahigginone methyl ether and (±)-curcuphenol
Du, Zhen-Ting,Li, An-Pai,Peng, Kun,Wu, Tong-Xing,Pan, Xin-Fu
, p. 571 - 574 (2007/10/03)
Using Grinard coupling as a key step, a facile synthetic approach to (±)-parahigginone methyl ether 1 and (±)-curcuphenol 2 has been achieved by five steps with 42.3% and 58.6% overall yield, respectively.