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首页> 美国政府科技报告 >Macrocycles Containing Tin. Syntheses of Symmetrical Macrocycles Containing Two or Four Diphenylstanna Units.
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Macrocycles Containing Tin. Syntheses of Symmetrical Macrocycles Containing Two or Four Diphenylstanna Units.

机译：含有锡的大环。含有两个或四个二苯基锡单元的对称大环的合成。

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The syntheses of macrocycles containing two diphenylstanna moieties, cyclo-(Ph2Sn(CH2)n-)2 (1, n = 4, 5, 6, 8, 10, 12), and four diphenylstanna moieties, cyclo-(Ph2Sn(CH2)n (-)4 (2, same n), are reported. Alpha, omega-bis (Bromomagnnesio)al-kanes reacted with Ph3SnC1 to give alpha, omega-bis(triphenylstannyl)alkanes which upon treatment with HBr gave alpha, omega-bis (bromodiphenylstannyl)alkanes (4). Compounds 4 reacted with the corresponding chain length alpha, omega-bis(bromomagnesio)alkanes to give 1 and 2. Alternatively, good yields of 1 (n = 4, 5, 6, 8) were obtained by converting 4 to dilithium reagents (7) which were allowed to react with alpha, omega-dibromoalkanes. Good yields of 2 (n = 4, 5, 6) were obtained by first treating 4 with C1(CH2) MgBr to give dichlorides which were then allowed to react with 7 in a second step. Purifications of the macrocyles and several synthetic intermediates were effected by preparative reverse phase chromatography. The macrocyclic products were characterized by NMR spectroscopy, molecular weight determinations and elemental analyses.

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