A cobalt-catalyzed cross-coupling betweenalkyl iodides and cyclopropyl, cyclobutyl, and alkenyl Grignard reagents is disclosed. The reaction allows the introduction of strained rings on a large panel of primary and secondary alkyl iodides. The catalytic system is simple and nonexpensive, and the reaction is general, chemoselective, and diastereoconvergent. The alkene resulting from the cross-coupling
Catellani reaction has received substantial attention because it enables rapid multiple derivatization on aromatics. While using alkyl electrophiles to achieve ortho‐alkylation was one of the earliest applications of the Catellani reaction, ipso‐alkylation‐terminated reactions with β‐H‐containing reactants has not been realized to date. Herein, we report alkylation‐terminated Catellani reaction using alkyl
How to make a carbonylative coupling faster than the easier nucleophilicsubstitution? In this communication, a rhodium-catalyzed radical-based carbonylative coupling of alkyl halides with thiolphenols has been realized. Thioesters were isolated in good yields in general.
作者:Fraser F. Fleming、Lee A. Funk、Ramazan Altundas、Vaqar Sharief
DOI:10.1021/jo026396+
日期:2002.12.1
tert-butoxide triggers the chemoselectivecyclization between nitrile anions and remote, enolizable carbonyl groups, despite the acidity difference favoring enolate formation and addition to the nitrile group. Domino deprotonation, cyclization, and dehydration efficiently transform a diverse array of omega-oxonitriles into carbocyclic and heterocyclic five- and six-membered alkenenitriles in a single synthetic
Titanocene(II)-promoted desulfurizative acylation of thioacetals with alkanenitriles
作者:Takeshi Takeda、Haruhiko Taguchi、Tooru Fujiwara
DOI:10.1016/s0040-4039(99)02001-8
日期:2000.1
Ketones were obtained in good yields by titanocene(II)-promoted reaction of thioacetals with alkanenitriles. The regioselective formation of α-substituted ketone was observed when the reaction was carried out in the presence of methyl iodide or benzyl bromide.