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Iridium Extends Strategic Relationship With Harris Corporation With a Complementary Hosted Payload Deal for Iridium NEXT

MCLEAN, Va., April 24, 2013 (GLOBE NEWSWIRE) -- Iridium Communications Inc. (Nasdaq:IRDM) announced today it has signed an agreement with Harris Corporation (NYSE:HRS) to enable the use of expanded h...

Cell biologists identify new protein key to asymmetric cell division

Biologists have identified a new molecular player in asymmetric cell division, a regulatory protein named She1 whose role in chromosome- and spindle positioning wasn't known before. Asymmetric cell di...

Catalytic asymmetric carbon–carbon bond formation using alkenes as alkylmetal equivalents

Organometallic reagents are widely used as nucleophiles in asymmetric catalysis. Here, alkylmetal species generated in situ by hydrometallation of alkenes are used in enantioselective copper-catalysed...

Phase-transfer-catalysed asymmetric synthesis of tetrasubstituted allenes

Substituted allenes with axial chirality are of great utility in organic chemistry owing to their unique structure and reactivity, but synthetic methods to access them are limited. Here, a catalytic a...

Simultaneous structure–activity studies and arming of natural products by C–H amination reveal cellular targets of eupalmerin acetate

Natural products are enduring leads for exploring cell biology, yet structure–activity relationship studies and 'arming' of these small molecules for subsequent cellular probe synthesis remains a ch...

Medical Business Systems Announces the Release of Iridium Suite Version 10, Expanding Its Reach to Serve All Medical Specialties

RENO, NV -- (Marketwire) -- 01/10/13 -- Locally owned Medical Business Systems announced today that it has released Iridium Suite version 10 which makes its user-friendly medical billing software th...

UMass Amherst cell biologists identify new protein key to asymmetric cell division

(University of Massachusetts at Amherst) Recently biologists at the University of Massachusetts Amherst led by Wei-lih Lee have identified a new molecular player in asymmetric cell division, a regulat...

Mammogram interpretation agreement varies by finding

(HealthDay)—Agreement between community-based radiologists and an expert radiology panel for interpreting mammograms is high for cancer cases and obvious findings, but is low for subtle and asymmetr...

Enantioselective synthesis of 2,5-dihydrobenzobazepine derivatives via iridium-catalyzed asymmetric allylic amination with 2-allylanilines and ring-closing-metathesis reaction.

Iridium-catalyzed asymmetric allylic amination of allylic carbonates with 2-allylanilines was realized. With a catalyst generated from 2 mol% of [Ir(dbcot)Cl](2) (dbcot = dibenzo[a,e]cyclooctatetraene...

Iridium-Catalyzed Allylic Vinylation and Asymmetric Allylic Amination Reactions with o-Aminostyrenes.

An Ir-catalyzed allylic vinylation reaction of allyl carbonates with o-aminostyrene derivatives has been realized, providing skipped (Z,E)-diene derivatives. With (E)-but-2-ene-1,4-diyl dimethyl dicar...

Formal Enantioselective Total Synthesis of Schulzeines A-C via Pd-Catalyzed Intramolecular Asymmetric Allylic Amination.

Formal enantioselective total synthesis of schulzeines A-C was accomplished, featuring highly efficient Pd-catalyzed asymmetric allylic amination using novel diphosphonite ligands (BOPs) to provide 1-...

An efficient synthesis of bridged heterocycles from an ir(i) bis-amination/ring-closing metathesis sequence.

The amination of bis-allylic imidates using an Iridium(I) catalyst leads to the efficient formation of 2,6-divinyl heterocycles. Careful screening of amines, solvents, and conditions has led to the di...

Asymmetric allylic alkylation in combination with ring-closing metathesis for the preparation of chiral N-heterocycles.

Asymmetric copper-catalyzed allylic substitution with methylmagnesium bromide is employed in combination with ring-closing olefin metathesis or ene-yne metathesis to achieve the synthesis of chiral, u...