convenient method for the synthesis of 3-methylthioindoles has been established which does not use smelly compounds such as thiol derivatives. The method, which introduces an alkyl- or arylthio-group into the C(3)-position of the indole skeleton, was extended to the direct introduction of a methylthio or bromo group at the C(2)-position using 3-methylthioindoles. No dimerization occurred, and the reaction
8,8-Disubstituted-6-methylergolines and related compounds
申请人:Eli Lilly and Company
公开号:US03968111A1
公开(公告)日:1976-07-06
8,8-Disubstituted-6-methylergolines and 9-ergolenes, prepared by alkylation of lysergic, isolysergic or their 9,10-dihydro analogues, optionally followed by chemical modification of an 8-substituent.
5-Bromination of an η<sup>2</sup>-8-Quinolyl Ligand Bound to Osmium(II) and Subsequent Lithiation and Derivatization of This Functionalized Ligand<sup>1</sup>
作者:Alex M. Clark、Clifton E. F. Rickard、Warren R. Roper、L. James Wright
DOI:10.1021/om980583+
日期:1998.10.1
Bromination of the 8-quinolyl ligand in the complex Os(eta(2)-8-quinolyl)Cl(CO)(PPh3)(2) (1) occurs selectively in, the 5-position, para to the osmium-carbon bond. Treatment of the brominated product, Os(eta(2)-8-quinolyl-Br-5)Cl(CO)(PPh3)(2) (2a), with BuLi gives an intermediate lithiated quinolyl species Os(eta(2)-8-quinolyl-Li-5)Cl(CO)(PPh3)(2) (3), which undergoes further reactions typical of aryllithium reagents. Treatment with the representative electrophiles n-BuBr, Bu3SnCl, and Me2NCO}Me produces Os(eta(2)-8-quinolyl-Bu-5)Cl(CO)(PPh3)(2) (4), Os(eta(2)-8-quinolyl-SnBu3-5)Cl(CO)(PPh3)(2) (5), and Qs(eta(2)-8-quinolyl-CO}Me-5)Cl(CO)(PPh3)(2) (6), respectively. Crystal structures of Os(eta(2)-8-quinolyl-Br-5)I(CO)(PPh3)(2) (2b) and Os(eta(2)-8-quinolyl-[CO}Me]-5)Cl(CO)(PPh3)(2) (6) have been determined.
Samath, S. Abdul; Raman, M.; Ramalingam, S. K., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1988, vol. 27, # 1, p. 63 - 65