Triphosgene and DMAP as Mild Reagents for Chemoselective Dehydration of Tertiary Alcohols
作者:Moshood O. Ganiu、Alexander H. Cleveland、Jarrod L. Paul、Rendy Kartika
DOI:10.1021/acs.orglett.9b01959
日期:2019.7.19
The utility of triphosgene and DMAP as mild reagents for chemoselective dehydration of tertiary alcohols is reported. Performed in dichloromethane at room temperature, this reaction is readily tolerated by a broad scope of substrates, yielding alkenes preferentially with the (E)-geometry. While formation of the Hofmann products is generally favored, a dramatic change in alkene selectivity toward the
Solvolytic displacement of alkyl halides by metal salts
作者:K.N. Gurudutt、B. Ravindranath、P. Srinivas
DOI:10.1016/0040-4020(82)80261-5
日期:1982.1
Reaction of allylic, benzylic and tertiary alkyl halides with zinc oxide in protic solvents leads to the formation of the corresponding alcohol, ethers and esters in good yields. The scope and limitations of this reaction have been examined. The possible involvement of ion quadruplets in the reaction is suggested.
Ni-Catalyzed Kumada–Corriu Cross-Coupling Reactions of Tertiary Grignard Reagents and Bromostyrenes
作者:Kaidi Li、Bing Zu、Clément Mazet
DOI:10.1021/acs.orglett.4c02185
日期:2024.7.19
congested quaternary centers is highly sought-after. Herein, we report a method for the cross-coupling of C(sp3) tertiary Grignard reagents with C(sp2) styrenyl bromides using readily available nickel precatalysts. We identified conditions that afford the products in practical yield for several combinations of electrophiles and nucleophiles, including sensitive α-magnesiated Grignard reagents. Dependent