New and improved methods for the conversion of nitroalkanes into geminal chloronitroso compounds

2013 ◽  
Vol 91 (1) ◽  
pp. 6-12 ◽  
Author(s):  
Rafael Bou-Moreno ◽  
Sandra Luengo-Arratta ◽  
Valérie Pons ◽  
William B. Motherwell
Keyword(s):  
Oxalyl Chloride ◽  
New Method ◽  
Silyl Nitronate ◽  
Improved Methods

The scope and limitations of a new method for the preparation of geminal chloronitroso compounds involving treatment of a nitronate anion with oxalyl chloride are described in full, and a milder, high yielding, and more chemoselective variant using the derived silyl nitronate is presented.

Observations on the reaction of nitronate anions with oxalyl chloride: a new method for the preparation of geminal chloronitroso compounds

2011 ◽  
Vol 52 (17) ◽  
pp. 2097-2099 ◽  
Author(s):  
Rafael Bou-Moreno ◽  
Sandra Luengo-Arratta ◽  
William B. Motherwell
Keyword(s):  
Oxalyl Chloride ◽  
New Method

Automation in Spillcut Marking

2015 ◽  
Vol 813-814 ◽  
pp. 880-884
Author(s):  
Sathyavel Gurumurthy ◽  
Surya Kamal Thakur ◽  
Sachin Mohan
Keyword(s):  
New Method ◽  
Injection Timing ◽  
Optimum Level ◽  
Valve Timing ◽  
Time Consumption ◽  
Improved Methods

The project involves elimination of rejection of H-engines during testing by improved methods of automation in spill cut using pneumatics which control the injection timing and is subsequently used at a later state in the engine assembly to set the valve timing. Improper injection timing leads to excess smoke. The new method which we have opted reduces man power, time consumption and the fuel wastage an optimum level which increases the productivity of the engine.

A New Method for the Preparation of Bis(alkylamino)maleonitriles from Aliphatic Isocyanides with TMSCN and Bi(OTf)3

Synthesis ◽  
2019 ◽  
Vol 51 (11) ◽  
pp. 2318-2322
Author(s):  
Sayaka Tafuku ◽  
Takuya Fukuda ◽  
Kazuhiro Chiba ◽  
Yoshikazu Kitano
Keyword(s):  
Single Step ◽  
Biologically Active ◽  
New Method ◽  
Reaction Conditions ◽  
Trimethylsilyl Cyanide ◽  
Alkyl Isocyanides ◽  
Improved Methods ◽  
Ether Ester ◽  
Active Substances ◽  
Tertiary Alkyl

Bis(alkylamino)maleonitriles are starting materials for the synthesis of a number of important intermediates, including porphyrazines that serve as dyes, pigments, and models of biologically active substances; hence, the development of improved methods for their preparation is important. Herein, we report a facile new method for the preparation of bis(alkylamino)maleonitriles from isocyanides. Treatment of tert-alkyl isocyanides with trimethylsilyl cyanide (TMSCN) and trimethylsilyl triflate (TMSOTf) in the presence of bismuth(III) triflate [Bi(OTf)3] afforded the corresponding bis(alkylamino)maleonitriles in moderate yields. tert-Alkyl isocyanides bearing a variety of functional groups, including halide, ether, ester, imide, amide, and carbamate, are tolerated under the developed reaction conditions. To the best of our knowledge, this is the first report of a synthetic method for the preparation of bis(alkylamino)maleonitriles in a single step from tertiary alkyl isocyanides.

Scapulothoracic Fusion for Facioscapulohumeral Dystrophy

2012 ◽  
Vol 4 (4) ◽  
pp. 291-293
Author(s):  
Laith Madlom ◽  
David Warwicker ◽  
David Cloke ◽  
David Stanley
Keyword(s):  
Case Report ◽  
Internal Fixation ◽  
Shoulder Function ◽  
Metal Plate ◽  
New Method ◽  
Rigid Fixation ◽  
Facioscapulohumeral Dystrophy ◽  
Medial Border ◽  
Improved Methods

Several techniques of scapulothoracic fusion have been described. These include the use of wires placed around the ribs and through holes in the scapula, a longitudinally positioned metal plate at the medial border of the scapula wired to the ribs, and the use of tibial strut grafts. However since these procedures were originally described there have been advances in both metal plate and screw technology which have resulted in improved methods of internal fixation. This case report describes a new method of scapulothoracic fusion which enables the scapula to be plated to the ribs giving rigid fixation and improved shoulder function.

Ionic-Liquid-Supported 1,3-Dimethylimidazolidin-2-one: Application as a Reusable Halogenation Reagent

Synlett ◽  
2019 ◽  
Vol 30 (08) ◽  
pp. 943-946 ◽  
Author(s):  
Shinichi Koguchi ◽  
Yuga Shibuya ◽  
Yusuke Igarashi ◽  
Haruka Takemura
Keyword(s):  
Ionic Liquid ◽  
Oxalyl Chloride ◽  
Reaction System ◽  
New Method ◽  
Isolation And Purification

We describe the synthesis of ionic-liquid-supported 1,3-dimethylimidazolidin-2-one, together with the halogenation of alcohols in a reaction system in which this reagent is combined with oxalyl chloride. A new method was established that does not require additives such as bases, and which permits the ready isolation and purification of the product. Good conversions were obtained, and good reusability of the reagent was observed.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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