Browsing MIT Libraries by Title
Now showing items 39327-39346 of 61744
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Niche strategies in the healthcare industry
(Massachusetts Institute of Technology, 2017)This paper examines niche strategies in the healthcare industry. I begin by discussing productivity trends in large firms. In order to understand trend shifts in productivity from a focus on output to a focus on input, I ... -
Nickel deposition on hydrodemetallation catalysts
(Massachusetts Institute of Technology, 1993) -
Nickel ferrite (NiFe204) thin films.
(Massachusetts Institute of Technology, 1966) -
A nickel hexacyanoferrate based thermo-electrochemical device For efficient heat-to-electricity conversion
(Massachusetts Institute of Technology, 2019)Effective and reliable ways to generate renewable energy is crucial for reducing global carbon emission in the ongoing battle against the climate crisis. Currently, low-temperature waste heat accounts for more than half ... -
Nickel precatalysts as enabling tools for catalytic coupling reactions
(Massachusetts Institute of Technology, 2015)[Chemical formula] A series of air-stable nickel complexes of the form L₂Ni(aryl)X (L = monodentate phosphine, X = Cl, Br) and LNi(aryl)X (L = bis-phosphine) have been synthesized and are presented as a library of precatalysts ... -
Nickel-based superalloy operating temperature determination via analysis of gamma/gamma' microstructure and coating/base material interdiffusion
(Massachusetts Institute of Technology, 2005)The average operating temperature of RENÉ N5® high pressure turbine blades was evaluated via [gamma]/[gamma]' microstructure and coating/base metal interdiffusion methods. The [gamma]' volume fraction was measured by point ... -
Nickel-catalyzed asymmetric arylations of [alpha]-halocarbonyl compounds and studies of boratabenzene-containing transition metal complexes
(Massachusetts Institute of Technology, 2010)Chapter 1 begins with a review of the current literature on cross-coupling methods to generate a-arylcarbonyl compounds, with a special emphasis on asymmetric arylations. The second section of chapter 1 describes the ... -
Nickel-catalyzed asymmetric cross-couplings of secondary alkyl electrophiles and photoinduced, copper-catalyzed C-N couplings
(Massachusetts Institute of Technology, 2014)Chapter 1 describes the development of three nickel-catalyzed asymmetric Negishi cross-couplings of secondary alkyl electrophiles via a stereoconvergent process. In Section 1.1, asymmetric Negishi arylations and alkenylations ... -
Nickel-catalyzed asymmetric cross-couplings of secondary allylic chlorides and planar-chiral compounds in asymmetric synthesis
(Massachusetts Institute of Technology, 2008)In Part I, nickel-catalyzed asymmetric carbon-carbon bond-forming reactions are described. A nickel/Pybox system effectively catalyzes regio- and enantioselective cross-couplings between racemic secondary allylic chlorides ... -
Nickel-catalyzed coupling reactions and synthetic studies toward ent-dioxepandehydrothyrsiferol via an epoxide-opening cascade
(Massachusetts Institute of Technology, 2008)Nickel-Catalyzed Coupling Reactions. Nickel-catalyzed allene--aldehyde coupling and alkene--aldehyde coupling represent two methods of preparing allylic alcohols. Most asymmetric transition metal-catalyzed methods of ... -
Nickel-catalyzed cross-couplings of unactivated secondary and tertiary alkyl halides and photoinduced copper-mediated asymmetric C-N cross-couplings
(Massachusetts Institute of Technology, 2013)Chapter 1 describes the development of two nickel-catalyzed Suzuki cross-coupling methodologies that employ alkyl halides as electrophiles. In Section 1.1, asymmetric [gamma]-alkylation relative to a carbonyl group is ... -
Nickel-catalyzed intermolecular reductive couplings of alkynes and aldehydes ; Enantioselective synthesis of (-)-terpestacin and structural revision of siccanol using catalytic stereoselective fragment couplings and macrocyclizations
(Massachusetts Institute of Technology, 2004)I. Nickel-Catalyzed Intermolecular Reductive Coupling of Alkynes and Aldehydes. Alkynes and aldehydes were coupled reductively in a single catalytic reaction to yield di- and trisubstituted allylic alcohols with high ... -
The nickel-catalyzed Mizoroki-Heck reaction : high regioselectivity in Olefin migratory insertion and photoredox-enabled indoline formation
(Massachusetts Institute of Technology, 2015)[chemical formula and color illustrations ...] Achieving high selectivity in the Heck reaction of electronically unbiased alkenes has been a longstanding challenge. Using a nickel-catalyzed cationic Heck reaction, we were ... -
Nickel-catalyzed preparation of acrylamides from alpha olefins and isocyanates ; Synthetic studies toward ripostatin A
(Massachusetts Institute of Technology, 2010)Chapter I. In the presence of the N-heterocyclic carbene ligand IPr, the nickel(0)-catalyzed coupling reaction of a-olefins and branched aliphatic isocyanates provides c,-unsaturated amides arising from preferential C-C ... -
Nickel-catalyzed reductive coupling reactions : application to the total syntheses of pumiliotoxins 209F and 251D
(Massachusetts Institute of Technology, 2007)Catalytic Asymmetric Reductive Coupling of 1,3-Enynes and Aromatic Aldehydes Nickel-catalyzed reductive coupling reactions of 1,3-enynes and aromatic aldehydes efficiently afford conjugated dienols in excellent regioselectivity ... -
Nickel-catalyzed reductive coupling reactions of 1,6-enynes and the total synthesis of (+)-acutiphycin
(Massachusetts Institute of Technology, 2007)Nickel-Catalyzed Reductive Coupling Reactions of Aldehydes and Chiral 1,6-Enynes. A study of nickel-catalyzed reductive coupling reactions of aldehydes and chiral 1,6-enynes has provided evidence for stereospecific ligand ... -
Nickel-catalyzed Suzuki-Miyaura reactions of unactivated halides with alkyl boranes and planar-chiral borabenzene catalysts for Diels-Alder reactions
(Massachusetts Institute of Technology, 2010)Part I describes the expansion in scope of a nickel-catalyzed coupling reaction of unactivated alkyl bromides and alkyl boranes to include unactivated alkyl chlorides. The new method is adapted for use outside of a glove ... -
The nickel-titanium-carbon system
(Massachusetts Institute of Technology, 1956) -
Nico's bubbles : the story of a whale, some crows, and the search for sentience
(Massachusetts Institute of Technology, 2011)Humans have long been drawn to the study of nonhuman animal cognitive and emotional intelligence, but have long come up short. Cognitive scientists look for signs of a sense of self, the ability to solve problems, and the ... -
Nicosia, the divided capital of Cyprus : a look at its present and future using the comparative study of Berlin and Jerusalem
(Massachusetts Institute of Technology, 1986)