Direct oxidative C(sp3) H cyanation of secondary benzylic ethers
作者:Zehua Wang、Ying Mao、Honghao Guan、Min Cao、Jing Hua、Lei Feng、Lei Liu
DOI:10.1016/j.cclet.2019.03.019
日期:2019.6
Abstract Current studies on the oxidativeCH functionalization of benzylic ethers for CC forging process dominantly focus on primary ethers. The corresponding reaction of secondary ethers remains underdeveloped. Herein, a practical and efficientoxidativeCH cyanation of secondary benzylic ethers with TMSCN in the presence of DDQ is described. The metal-free process is well tolerated with a wide
Cross-dehydrogenative coupling of secondary benzylic ethers with indoles and pyrroles
作者:Min Cao、Ying Mao、Jiancheng Huang、Yudao Ma、Lei Liu
DOI:10.1016/j.tetlet.2019.03.032
日期:2019.4
Current studies on cross-dehydrogenative coupling of benzylic ethers for new C–C bond construction predominantly focus on primary ether moieties. Oxidative cross-coupling of secondary benzylic ethers remains elusive. Herein, we describe the first cross-dehydrogenative coupling of secondary benzylic ethers with indoles and pyrroles for tertiary ether construction. A broad range of α-aryl substituted
The oxa-Pictet-Spengler reaction with various aldehydes and -arylethanol yields 1-substituted-isochromans in the presence of bismuth triflate as catalyst in good yields. The method was extended to O,O-acetals to afford the corresponding 1,1-disubstituted-isochromans in good yields. These studies also provide insights into the catalytic role of triflic acid generated upon hydrolysis of Bi(OTf)3 by residual water. The low toxicity and easy handling of Bi(OTf)3 by comparison with triflic acid make these procedures an attractive method to provide isochromans in good to excellent yields.
GATTA, F.;PIAZZA, D.;DEL, GIUDICE, M. R.;MASSOTTI, M., FARMACO. ED. SCI., 1985, 40, N 12, 942-955
作者:GATTA, F.、PIAZZA, D.、DEL, GIUDICE, M. R.、MASSOTTI, M.
DOI:——
日期:——
Gatta; Piazza; Del Giudice, Farmaco, Edizione Scientifica, 1985, vol. 40, # 12, p. 942 - 955