Asymmetric cyclopropanation of olefins catalysed by Cu(I) complexes of chiral pyridine-containing macrocyclic ligands (Pc-L*)

The synthesis and characterisation of copper(I) complexes of chiral pyridine-containing macrocyclic ligands (Pc-L*) and their use as catalysts in asymmetric cyclopropanation reactions are reported. All ligands and metal complexes were fully characterised, including crystal structures of some species determined by X-ray diffraction on single crystals. This allowed characterising the very different conformations of the macrocycles which could be induced by different substituents or by metal complexation. The strategy adopted for the ligand synthesis is very flexible allowing several structural modifications. A small library of macrocyclic ligands possessing the same donor properties but with either C-1 or C-2 symmetry was synthesized. Cyclopropane products with both aromatic and aliphatic olefins were obtained in good yields and enantiomeric excesses up to 99%.

Dim-Red-Light-Induced Increase in Polar Auxin Transport in Cucumber Seedlings1 : I. Development of Altered Capacity, Velocity, and Response to Inhibitors

We have developed and characterized a system to analyze light effects on auxin transport independent of photosynthetic effects. Polar transport of [3H]indole-3-acetic acid through hypocotyl segments from etiolated cucumber (Cucumis sativus L.) seedlings was increased in seedlings grown in dim-red light (DRL) (0.5 μmol m−2 s−1) relative to seedlings grown in darkness. Both transport velocity and transport intensity (export rate) were increased by at least a factor of 2. Tissue formed in DRL completely acquired the higher transport capacity within 50 h, but tissue already differentiated in darkness acquired only a partial increase in transport capacity within 50 h of DRL, indicating a developmental window for light induction of commitment to changes in auxin transport. This light-induced change probably manifests itself by alteration of function of the auxin efflux carrier, as revealed using specific transport inhibitors. Relative to dark controls, DRL-grown seedlings were differentially less sensitive to two inhibitors of polar auxin transport, N-(naphth-1-yl) phthalamic acid and 2,3,5-triiodobenzoic acid. On the basis of these data, we propose that the auxin efflux carrier is a key target of light regulation during photomorphogenesis.

Letter from Rufus King to William Tudor,

One letter regarding a meeting between the elder William Tudor and the King of England at the Court of Saint James.

Luther's reply to King Henry VIII, now first Englished after the lapse of four centuries,

Mode of access: Internet.

An institute of the laws of England; or, The laws of England in their natural order, according to common use. Published for the direction of young beginners, or students in the law; and of others that desire to have a general knowledge in our common and statute laws.

Includes index.

John Bull and his unemployed. A plain statement on the law of England as it affects the unemployed.

Mode of access: Internet.

The marriage law of England : a practical treatise on the legal incidents connected with the law of constitution of the matrimonial contract, with an appendix of statutes, summary of colonial marriage laws, and other information /

Includes index.

Whitehall Ceiling: The Union of the Crowns of England and Scotland

Peter Paul Rubens; 25 ft.x 17 ft. 11 23/64 in.; oil on canvas

A history of the criminal law of England.

Mode of access: Internet.

Lollardy and the reformation of England, an historical survey,

Vol. IV edited by William Hunt from manuscript which the author left "in an unfinished state." cf. Pref., vol. IV.

The life and character of Edmund Geste, S. T. P. The principal compiler of the church of England ... the first protestant bishop of Rochester, afterwards bishop of Salisbury, by appointment of and almoner to Queen Elizabeth.

Appendix I: A treatise against the prevee masse in the behalfe and furtheraunce of the mooste holye communyon made by Edmund Geste. 1548: p. [69]-140.

A biographical history of England, from Egbert the Great to the revolution: consisting of characters disposed in different classes, and adapted to a methodical catalogue of engraved British heads: intended as an essay towards reducing our biography to system, and a help to the knowledge of portraits: interspersed with a variety of anecdotes, and memoirs of a great number of persons...

Mode of access: Internet.

Domesday book, or the great survey of England of William the Conqueror A. D. MLXXXVI.

Volumes for Essex, Norfolk, and Suffolk, 31 x 24 cm.