A Highly Efficient Solvent-Free Asymmetric Direct Aldol Reaction Organocatalyzed by Recoverable (s)-Binam-L-Prolinamides. ESI-MS Evidence of the Enamine-Iminium Formation

Recoverable (Sa)-binam-l-prolinamide in combination with benzoic acid is used as catalysts in the direct aldol reaction between cycloalkyl, alkyl, and α-functionalized ketones and aldehydes under solvent-free reaction conditions. Three different methods are assayed: simple conventional magnetic stirring, magnetic stirring after previous dissolution in THF and evaporation, and ball mill technique. These procedures allow one to reduce not only the amount of required ketone to 2 equiv but also the reaction time to give the aldol products with regio-, diastereo-, and enantioselectivities comparable to those in organic or aqueous solvents. Generally anti-isomers are mainly obtained with enantioselectivities up to 97%. The reaction can be carried out under these conditions also using aldehydes as nucleophiles, yielding after in situ reduction of the aldol products the corresponding chiral 1,3-diols with moderate to high enantioselectivities mainly as anti-isomers. The aldol reaction has been studied by the use of positive ESI-MS technique, providing the evidence of the formation of the corresponding enamine−iminium intermediates.

Namāz : manuscript, 1858-1865

Ritual Prayer in Arabic with instructions on number of prostration cycles (rakaʻahs) to be performed during each of the five prayer times.

[ 3 ginān books

Pīr Ǵulām ʻAlī Shāh ... [et al.]].

Alcoa structural handbook ; a design manual for aluminum.

"Supplement; a reprint of ASCE Proceedings ...: Paper number 970, Specifications for structures of aluminum alloy 6061-T6; second progress report of the Committee of the Structural Division on Design in Lightweight Structural Alloys [and] Paper number 971, Specifications for structures of aluminum alloy 2014-T6; third progress report of the Committee of the Structural Division on Design in Lightweight Structural Alloys": 34, 32 pages at end.

The Elector's guide. Addressed to the freeholders of the county of York.

No. I. The "Catholic question".--No. II. The general state of the country banks and paper money; Death of Alexander, emperor of Russia; State of parties in the kingdom; A letter to Fountayne Wilson, esq.; Duncombe and the treadmill; Poetry and miscellanies.--No. III. A letter to the Duke of York; Auri sacra fames; or, Sturdy beggars: a county job; Church Methodism; A Protestant confessor; His Majesty's speech to Parliament; Miscellanies, and poetry.--No. IV. A letter to Daniel Sykes, esq. on West Indian slavery; Catholic and Protestant; The last man; Confidence in banks; Hints to electors; The proceedings in Parliament, &c., &c., &c.--No. V. An address to the suffering people of England; Slavery; A letter to Sir John Bayley, knt,; Banks; The Protestant champion; Poetry, &c., &c.--No. VI. A charge of His Grace the Archbishop of York to the clergy of the diocese; A secret; A good action.--No. VII. Observations upon county representation; A full account of the county meeting, &c., &c.

Œuvres de Victor Hugo ...

Vols. 16-20 have engravings in two states, satin and paper.

Waste material series,

Reproduced from type-written copy.

Imports into the United States for consumption, by countries, for the calendar year 1936. W. P. A. statistical project 265-31-7000, Richmond, Virginia ...

"Compiled from preliminary statistics of imports supplied by the Department of commerce."

Falkland /

In white boards with pink cloth spine and paper label.

Journals of the House of Burgesses of Virginia, 1727-1734, 1736-1740.

Edited and published by authority of the Library Board, Virginia State Library.

Journals of the House of Burgesses of Virginia, 1752-1755, 1756-1758.

Edited and published by authority of the Library Board, Virginia State Library.

Journals of the House of Burgesses of Virginia, 1702/3-1705, 1705-1706, 1710-1712.

Edited and published by authority of the Library Board, Virginia State Library.

Financial pamphlets

A collection of miscellaneous pamphlets on finance.

Journals of the House of Burgesses of Virginia, 1742-1747, 1748-1749.

Edited and published by authority of the Library Board, Virginia State Library.

Journals of the House of Burgesses of Virginia, 1766-1769;

Editor's foot-note: Resolves protesting against unjust taxation and the trial in England of persons accused of committing crimes in America.