Joshi, N..N.; Mamdapur, V. R.; Chadha, M. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 3, p. 238 - 240
Joshi, N..N.; Mamdapur, V. R.; Chadha, M. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 3, p. 238 - 240
Synthesis of Bicyclo[<i>n</i>
.1.0]alkanes by a Cobalt-Catalyzed Multiple C(sp<sup>3</sup>
)−H Activation Strategy
作者:Zhuo-Zhuo Zhang、Ye-Qiang Han、Bei-Bei Zhan、Sai Wang、Bing-Feng Shi
DOI:10.1002/anie.201707638
日期:2017.10.9
cobalt‐catalyzed dual C(sp3)−H activationstrategy has been developed and it provides a novel strategy for the synthesis of bicyclo[4.1.0]heptanes and bicyclo[3.1.0]hexanes. A key to the success of this reaction is the conformation‐induced methylene C(sp3)−H activation of the resulting cobaltabicyclo[4.n.1] intermediate. In addition, the synthesis of bicyclo[3.1.0]hexane from pivalamide, by a triple C(sp3)−H activation
An efficient Ni-catalyzed hydrodifluoroalkylation of unactivated alkenes with bromodifluoroacetate by using PhSiH3 as hydride source was developed. The transformation affords aliphatic difluorides with anti-Markovnikov regioselectivity. A wide range of highly remote alkenes, simple alkenes, drug molecules, commercially available CF2 precursors, and even nonfluorinated substrates are competent in this
Absolute Rate Expressions for Hydrogen Atom Abstraction from Molybdenum Hydrides by Carbon-Centered Radicals
作者:James A. Franz、John C. Linehan、Jerome C. Birnbaum、Kenneth W. Hicks、M. S. Alnajjar
DOI:10.1021/ja991412e
日期:1999.10.1
expressions for hydrogenatomabstraction by primary, secondary, and tertiary alkyl radicals in dodecane and benzyl radical in benzene from the molybdenum hydride Cp*Mo(CO)3H and for reactions of a primary alkyl radical with CpMo(CO)3H in dodecane are reported (Cp* = η5-pentamethylcyclopentadienyl, Cp = η5-cyclopentadienyl). Rate expressions for reaction of primary, secondary, and tertiary radical clocks with
Intramolecular [2 + 2]cycloadditions of dialkylketenes with alkenes. Regiochemistry of intramolecular [2+2]cycloadditions of ketenes with alkenes
作者:Barry B. Snider、Alban J. Allentoff、Marleen B. Walner
DOI:10.1016/s0040-4020(01)81460-5
日期:——
Unsaturated dialkylketenes 7a, 7b and 7c undergo intramolecular [2 + 2]cycloadditions to give 8a (45%), 9b (23%) and 9c (45%). Intramolecularcycloadditions of dialkylketenes give higher yields than intramolecularcycloadditions of monoalkylketenes, even though dialkylketenes are less reactive than monoalkylketenes. An intramolecular competition experiment with ketene 17 establishes that trans-alkenes
The present invention provides a cross-linking agent capable of preventing formation of scum from a bottom anti-reflective coating, and also provides a composition for forming a bottom anti-reflection coating containing the agent. The cross-linking agent is a nitrogen-containing aromatic compound having at least one vinyloxy group or N-methoxymethylamide group, and the composition contains the cross-linking agent. The cross-linking agent of the formula (1) can be produced by reaction of a nitrogen-containing aromatic compound, a halogen compound having a vinyloxy group or N-methoxymethylamide group and a basic compound.