4287-30-3Relevant articles and documents
Carbon isotope labeling of carbamates by late-stage [11C], [13C] and [14C]carbon dioxide incorporation
Del Vecchio, Antonio,Talbot, Alex,Caillé, Fabien,Chevalier, Arnaud,Sallustrau, Antoine,Loreau, Olivier,Destro, Gianluca,Taran, Frédéric,Audisio, Davide
supporting information, p. 11677 - 11680 (2020/10/19)
A general procedure for the late-stage [11C], [13C] and [14C]carbon isotope labeling of cyclic carbamates is reported. This protocol allows the incorporation of carbon dioxide, the primary source of carbon-14 and carbon-11 radioisotopes, in a direct, cost-effective and sustainable manner. A disconnection/reconnection strategy, involving ring opening/isotopic closure, was also implemented.
Metal-Free I2-Catalyzed Highly Selective Dehydrogenative Coupling of Alcohols and Cyclohexenones
Liang, Yu-Feng,Yuan, Yizhi,Shen, Tao,Song, Song,Jiao, Ning
, p. 233 - 240 (2018/02/19)
The I2 catalyzed highly selective oxidative condensation of cyclohexenones and alcohols for the synthesis of aryl alkyl ethers has been described. DMSO is employed as the mild terminal oxidant. This novel methodology offers a metal-free reaction condition, operational simplicity and broad substrate scope to afford valuable products from inexpensive reagents. Various meta-substituted aromatic ethers which are hardly synthesized from the reported methods requiring meta-substituted phenols, are efficiently prepared by the present protocol.
An Au-Catalyzed Cyclialkylation of Electron-Rich Arenes with Epoxides to Prepare 3-Chromanols
Shi, Zhangjie,He, Chuan
, p. 5964 - 5965 (2007/10/03)
A gold-catalyzed cyclialkylation of electron-rich arenes with tethered epoxides afforded 3-chromanols stereospecifically. Copyright
Synthesis of some 3-aryloxymethyl-3,4-dihydroisocoumarins
Brahmbhatt,Pandya, Urvish R.
, p. 2100 - 2103 (2007/10/03)
Various 3-aryloxymethyl-3,4-dihydroisocoumarins 5a-1 have been synthesized by alkylation of the ortho-lithio derivatives of N-methyl benzamides 2a-c with 2-aryloxymethyl oxiranes 3a-d followed by the alkaline hydrolysis of the resultant intermediates 4a-1.
Efficient asymmetric hydrogenation of α-amino ketone derivatives. A highly enantioselective synthesis of phenylephrine, levamisole, carnitine and propranolol
Sukuraba,Takahashi,Takeda,Achiwa
, p. 738 - 747 (2007/10/02)
The complexes of pyrrolidine bisphosphine ligands (CPMs) with rhodium (I) were found to be efficient catalysts for asymmetric hydrogenation of α-amino ketone hydrochloride derivatives. Utilizing this methodology, we have developed efficient asymmetric syntheses of the optically active β-amino alcohols, phenylephrine, levamisole, carnitine and propranolol.