Organocatalysis Episode 1 doc

... Leipzig 21/ 318 0/YL – 543 210 Printedonacid-free paper New Concepts for Organocatalysis 11 Scheme 7. Enamine catalysis of nucleophilic substitution reactions New Concepts for Organocatalysis 15 Scheme 11 . ... addition reactions to aldimines (Scheme 11 ). 3 .1 Catalytic Asymmetric Pictet–Spengler Reaction The Pictet–Spengler reaction (Pictet and Spengler 19 11; Tatsui 19 28) is...

Ngày tải lên: 12/08/2014, 16:21

... number of filler metal feeding systems available to accomplish the task automatically. Figure 1. 1 shows the essentials of the manual GTAW process. Advantages of the GTAW Process The greatest ... System Power Cord Torc h Gas In Gas Out Adapter Block Gas Valve Work Work Clamp Work Cable Figure 1. 1 Essentials of the GTAW process (water cooled). ... be added to enhance travel speeds. The GTA...

Ngày tải lên: 12/08/2014, 08:21

... Synlett 2004: 211 1– 211 4 Enders D, Niemeier O, Balensiefer T (2006) Asymmetric intramolecular crossed-benzoin reactions by N-heterocyclic carbene catalysis. Angew Chem Int Ed 45 :14 63 14 67 Fischer ... 53% in both cases (Scheme 14 ). Using IMes as the catalyst in THF at 60 °C resulted in the cyclization of 14 and 16 to the bi- and tricyclic γ- butyrolactones 15 and 17 (Scheme 14 ). B...

Ngày tải lên: 12/08/2014, 16:21

... Chemistry 48 R. Greenwood, G. Mills and B. Vrana (Editors) Volume 48 ISSN: 016 6-526X DOI: 10 .10 16/S 016 6-526X(06)480 01- 6 r 2007 Elsevier B.V. All rights reserved. 3 Contents Contributors to Volume ... microextraction. 6 1. 2 .1 Equilibrium extraction . . 7 1. 2.2 Exhaustive extraction. . . 8 1. 2.3 Pre-equilibrium extraction . . . 9 1. 2.4 Calibration based on first-order reaction...

Ngày tải lên: 12/08/2014, 16:21

... published in 19 84 ISBN 978-3-540-77506-5 DOI 10 .10 07/978-3-540-778 01- 1 e-ISBN 978-3-540-778 01- 1 Scientific Computation ISSN 14 34-8322 Library of Congress Control Number: 2007942575 © 2008, 19 84 Springer-Verlag ... y0 w1 h1" alt="" Contents Some Preliminary Comments xiv CHAPTER I Generalities on Elliptic Variational Inequalities and on Their Approximation 1 1. Introduction 1...

Ngày tải lên: 12/08/2014, 16:21

... f 0  1 4f 0 − 1 4f 0 cos(2πf 0 (1 − n)t)dt = 1 2π (1 + n) sin(2πf 0 (1 + n)t)| 1 4f 0 1 4f 0 + 1 2π (1 − n) sin(2πf 0 (1 − n)t)| 1 4f 0 1 4f 0 = 1 π (1 + n) sin( π 2 (1 + n)) + 1 π (1 − n) sin( π 2 (1 − n)) Thus ... obtain n  i =1 α i β i AB ≤ 1 2 n  i =1 α 2 i A 2 + 1 2 n  i =1 β 2 i B 2 = 1 2A 2 n  i =1 α 2 i + 1 2B 2 n  i =1 β 2 i = 1...

Ngày tải lên: 12/08/2014, 16:21