CF3 on C: Trifluoromethylation of allylsilane derivatives was accomplished through the use of CuI and Togni's reagent (1) under mild conditions. The reaction of allylsilanes without a substituent in the 2‐position gave vinylsilane derivatives, while 2‐substituted allylsilanes afforded desilylated products. The utility of the products was demonstrated through their further transformation.
Enantioselective Synthesis of α-Allyl Amino Esters via Hydrogen-Bond-Donor Catalysis
作者:Andrew J. Bendelsmith、Seohyun Chris Kim、Masayuki Wasa、Stéphane P. Roche、Eric N. Jacobsen
DOI:10.1021/jacs.9b05556
日期:2019.7.24
diastereoselec-tive synthesis of α-allyl amino esters. The optimized protocol provides access to N-carbamoyl-protected amino esters via nucleophilic allyla-tion of readily accessible α-chloro glycinates. A variety of useful α-allyl amino esters were prepared-including crotylated products bearing vicinal stereocenters that are inaccessible through enolate alkylation-with high enantioselectivity (up to 97% ee)
Gold-catalyzed synthesis of 1,3-disubstituted benzenes through tandem allylation/cyclization reaction of alkynals
作者:Sabyasachi Bhunia、Shariar Md. Abu Sohel、Chao-Chin Yang、Shie-Fu Lush、Fwu-Ming Shen、Rai-Shung Liu
DOI:10.1016/j.jorganchem.2008.10.049
日期:2009.2
Treatment of alkynals with 2-substituted allylsilanes and PPh3AuCl/AgOTf (5/3 mol%) catalyst led to formation of 1,3-disubstituted benzenes efficiently. This reaction sequence comprises an initial allylation of aldehyde, followed by cycloisomerization of enynes; PPh3AuOTf is active in both steps.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> catalysed 1,6-conjugate allylation of <i>para</i>-quinone methides: expedient access to allyl diarylmethanes
作者:Sriram Mahesh、Guddi Kant、Ramasamy Vijaya Anand
DOI:10.1039/c6ra19069c
日期:——
An efficient protocol for the synthesis of unsymmetrical allyl diarylmethanes through a Lewis acid catalysed 1,6-conjugate addition of allylsilanes to para-quinone methides is described.
Trifluoromethylthiolation of Allylsilanes and Silyl Enol Ethers with Trifluoromethanesulfonyl Hypervalent Iodonium Ylide under Copper Catalysis
作者:Sadayuki Arimori、Masahiro Takada、Norio Shibata
DOI:10.1021/acs.orglett.5b00057
日期:2015.3.6
Electrophilic trifluoromethylthiolation of allylsilanes and silyl enol ethers with trifluoromethanesulfonyl hypervalentiodoniumylide has been conducted. In the presence of a catalytic amount of CuF2, the reaction proceeded in modest to high yields under mild conditions.