Betylates. 3. Preparative nucleophilic substitution by way of [2]-, [3]-, and [4]betylates. Stoichiometric phase transfer and substrate-reagent ion-pair (SRIP) reactions of betylates
Selective Conversion of Alcohols into Alkyl Iodides Using a Thioiminium Salt
作者:Adam R. Ellwood、Michael J. Porter
DOI:10.1021/jo901415n
日期:2009.10.16
Treatment of a range of primary and secondary alcohols with MeSCH═NMe2+ I− affords the corresponding alkyliodides in excellent yield with straightforward purification. Selective formation of a primary iodide in the presence of a secondary alcohol can be achieved.
Photochemistry of Racemic and Resolved 2-Iodooctane. Effect of Solvent Polarity and Viscosity on the Chemistry
作者:Fang Gao、David Boyles、Rodney Sullivan、Robert N. Compton、Richard M. Pagni
DOI:10.1021/jo020472r
日期:2002.12.1
resolved 2-iodooctane was examined in cyclopentane, methanol, and 2-methyl-2-propanol, media with differing polarities and viscosities. The photochemistry of racemic 2-iodooctane was also examined in the gas phase. The photochemistry of 2-deuterio- and 1,1,1-trideuterio-2-iodooctane in cyclopentane and methanol was also studied. The photoreactions in cyclopentane, 2-methyl-2-propanol, and the gas phase
followed by a transmetalation with CuBr⋅P(OEt)3 (−100 °C, 20 s). These stereodefined secondary alkylcoppers underwent stereoretentive cross‐couplings with several 3‐iodo or 3‐bromo unsaturated carbonyl derivatives leading to the corresponding γ‐methylated Michael acceptors in good yields and with high diastereoselectivities (dr up to 96:4). The method was extended to enantiomerically enriched alkylcoppers
Nickela‐electrocatalyzed Mild C−H Alkylations at Room Temperature
作者:Ramesh C. Samanta、Julia Struwe、Lutz Ackermann
DOI:10.1002/anie.202004958
日期:2020.8.10
nickel catalysis commonly requires high reaction temperatures and strong bases, translating into limited substrate scope. Herein, nickel‐catalyzed C−H alkylations of unactivated 8‐aminoquinoline amides have been realized under exceedingly mild conditions, namely at room temperature, with a mild base and a user‐friendly electrochemical setup. This electrocatalyzed C−H alkylation displays high functional
Ultrasound in organic synthesis 11. Retention of optical activity in barker reactions from S(+) 2-octyl halides. Mechanistic consequences
作者:Jayne C. de Souza-Barboza、Jean-Louis Luche、Christian Pétrier
DOI:10.1016/s0040-4039(00)96033-7
日期:1987.1
S(+) 2-octyl halides react spontaneously or under sonication with lithium and cyclohexanone to give an opticallyactivealcohol. Its enantiomeric excess and absolute configuration, strongly suggest the existence of 2 reactive intermediates following different stereochemical pathways to the condensation alcohol.