Ring Contraction of 1,2-Dihydronaphthalenes Promoted by Thallium(III) in Acetonitrile: A Diastereoselective Approach to Indanes

trans-1,3-Disubstituted indanes are conveniently accessed by a stereoselective ring contraction of 1,2-dihydronaphthalenes upon treatment with thallium(III) nitrate (TTN) in acetonitrile. Under these conditions, the oxidative rearrangement of either di- or trisubstituted double bonds is possible.

Catalytic Enantioselective alpha-Arylation of Carbonyl Compounds

Enantioselective creation of benzylic quaternary centers still is a continuous challenge to many synthetic organic chemists. Among the existing methods for installation of this type of center, the direct asymmetric alpha-arylation of carbonyl compounds is very attractive due to the ready availability of the coupling substrates. Herein, we present some new tools to the catalytic asymmetric alpha-arylation of carbonyl compounds that overcame many of the drawbacks posted in previous methods for this type of reaction.

An Improved Procedure for the Preparation of [Bis(2,2,2-trifluoroethyl)phosphono]acetic Acid

A different and improved procedure for the preparation of [bis(2,2,2-trifluoroethyl)phosphono]acetic acid in just one step from bis(2,2,2-trifluoroethyl)phosphonate is described. The protocol employs a Michaelis-Becker reaction between commercially available bis(2,2,2-trifluoroethyl) phosphonate and bromoacetic acid, furnishing [bis(2,2,2-trifluoroethyl)phosphono]acetic acid in 50-54% yield.

Carpentry Students at Work

Carpentry students from the New York Trade School at work during a class. Black and white photograph.

Temporal indicators of language dominance in bilingual children

In the field of bilingualism it is of particular interest to stablish which, if any, of a speaker’s languages is dominant. Earlier research has shown that immigrants who acquire a new language tend to use elements of the timing patterns of the new language in their native language. It is shown here that measurements of timing in the two languages spoken by bilingual children can give information about the relative dominance of the languages for the individual speaker.

Perspective: LaGuardia Community College Newsletter (December 1975)

A newsletter published periodically to keep the faculty, students, staff, and community informed about the activities taking place on the campus of LaGuardia Community College. Information for PERSPECTIVE should be sent to Bob McVeigh In Room 341, Main Bldg., ext. 248, 249.

Nov/Dec 2011: FDSys

http://digitalcommons.winthrop.edu/dacusdocsnews/1055/thumbnail.jpg

A Hard Rain's AGonna Fall

The June issue of the Chronicle of Higher Education showcased as its cover story the blaring headlines, “Should the Internet Be Scrapped?” Did this surprise anyone? If it did, you must not have been paying attention. Over the last decade, the Internet, the Web—yes, yes, I know the terms are technically not synonymous but have become so in usage—has become increasingly useless as a scholarly tool. The CHE story discussed the obvious problems: spam, viruses, unreliable connections, not to mention unreliable information, disinformation and even misinformation.

Type 14 Design B Port Side; Santa Louisa

print no 78, discoloration in upper half of print