Bartlett, E. H.; Eaborn, C.; Walton, D. R. M., Chemical Abstracts, U.S. Clearinghouse Fed. Sci. Tech. Inform. AD 701102 (1969)11 S., 1970, vol. 73, p. 35473
The visible-light-driven preparation of (hetero)aryl stannanes was carried out under both photocatalyst- and metal-free conditions via irradiation of arylazo sulfones in the presence of hexaalkyldistannanes. The reaction shows a high efficiency and a wide substrates scope. The resulting crude organotin derivatives can be directly employed in a Stille protocol.
Synthesis of Aryl Trimethylstannane via BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Cross-Coupling of Hexaalkyl Distannane Reagent with Aryl Triazene at Room Temperature
BF3·OEt2-mediated cross-coupling of (SnMe3)2 with aryl triazene offers a new strategy for the synthesis of aryl stannane. A variety of synthetically useful aryl trimethylstannanes were produced in moderate to good yields with this metal-free approach. One-pot sequential Stille cross-coupling with different aryl bromides provides a short entry to both symmetrical and unsymmetrical biaryl compounds.
The reaction between cis-bis(trifluoroacetato)bis(trioganophosphine)platinum(II) and tetraorganotin compounds
作者:Colin Eaborn、Kevin J. Odell、Alan Pidcock
DOI:10.1039/dt9790000758
日期:——
The complex cis-[Pt(O2CCF3)2L2](L = PMe2Ph) reacts with SnRMe3 compounds (R = aryl) to give trans-[PtR(O2CCF3)L2] and cis-[PtR2L2], except for the sterically hindered mesityltrimethyltin which gives mainly trans-[PtMe(O2CCF3)L2]. The latter is also the main product from SnMe3(CH2Ph). For L = PPh3, SnMe3Ph, and SnMe3(C6H4Me-p) give mainly cis-[PtMe(O2CCF3)L2]. For L = PMe2Ph, SnMe4 gives only trans-[PtMe(O2CCF3)L2]
Disclosed herein is a compound of the formula ##STR1## known as 2-[N-(N-benzyloxycarbonyl-L-leucinyl)]-2'-[N'-[4-(N,N-dimethylaminomethyl) benzyloxy]carbonyl-L-leucinyl]carbohydrazide; and pharmaceutically acceptable salts, hydrates and solvates thereof.
Strategies for the synthesis of bi- and triarylic materials starting from commercially available phenols
作者:Alicia B. Chopa、Gustavo F. Silbestri、María T. Lockhart
DOI:10.1016/j.jorganchem.2005.05.023
日期:2005.9
of arylstannanes have been synthesized, through an SRN1mechanism, in good to excellent yields (74%–99%) by the photostimulated reaction of trimethyl stannyl ion with substrates supporting different nucleofugal groups. The arylstannanes thus obtained were suitable intermediates for Stille cross-coupling reactions leading to asymmetric bi- and triaryl compounds in acceptable global yields. An attractive