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Letters<br />
VIII Table of Contents<br />
2795 C. Praveen<br />
S. Jegatheesan<br />
P. T. Perumal*<br />
2801 M. G. Gonçalves-Martin<br />
A. Saxer<br />
P. Renaud*<br />
2803 S. Hanessian*<br />
X. Wang<br />
2809 H.-G. Lee<br />
M.-J. Kim<br />
S.-E. Park<br />
J.-J. Kim<br />
B. R. Kim<br />
S.-G. Lee<br />
Y.-J. Yoon*<br />
Gold(III) Chloride Catalyzed Intermolecular Dimerization of<br />
2-Ethynylanilines: Synthesis of Substituted Quinolines<br />
R<br />
NH2<br />
+<br />
R<br />
NH2<br />
5 mol% AuCl3, 10 mol% AgOTf<br />
MeCN, N 2, reflux<br />
A Practical Synthesis of (S)-Cyclopent-2-enol<br />
OH<br />
S<br />
O<br />
SiMe 3<br />
Applications of the N-tert-Butylsulfonyl (Bus) Protecting Group in Amino<br />
Acid and Peptide <strong>Chemistry</strong><br />
R<br />
H2N CO2Me<br />
R<br />
BusHN CO 2Me<br />
R = Me, i-Pr, CH 2CO 2Me, Bn, i-Bu, etc.<br />
R<br />
R<br />
H 2N CO 2Me<br />
Phenyl 4,5-Dichloro-6-Oxopyridazine-1(6H)-Carboxylate as Carbonyl<br />
Source: Facile and Selective Synthesis of Carbamates and Ureas under Mild<br />
Conditions<br />
R 1 R 2 NH<br />
alkyl or aryl<br />
amines<br />
Cl<br />
Cl<br />
N N<br />
O<br />
C<br />
O O<br />
THF<br />
– 4,5-dichloropyridazin-3(2H)-one<br />
O<br />
2 R 1 RN O<br />
R<br />
N<br />
1<br />
O<br />
R2 N<br />
O<br />
Me<br />
N<br />
2 R 1 RN NR 3 R 4<br />
carbamates unsymmetric ureas<br />
R 1<br />
R 2<br />
symmetric ureas<br />
NH2<br />
R
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