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- W2046553921 abstract "Die Umsetzung von 1,3-Bis(diisopropylamino)-2,4-bis(trimethylsilyl)-1,3-dihydro-1,3-diboret (3) mit Kalium bzw. Lithium in THF führt zum 2K+ (3)2−, bzw. gelben 2Li+(3)2−, die mit HN(SiMe3)2 zum 1,3-Diboretan 4a reagieren. Aus (3)2− und CH2Br2 entsteht das Isomere 4a′ mit geminalen Me3Si-Gruppen. 3 läßt sich mit H2/Pd zu 4a hydrieren, ebenso wird aus 1,3-Bis(diisopropylamino)-1,3-dihydro-1,3-diboret das 1,3-Diboretan 4c gebildet. Umsetzung von (3)2 mit CH3I ergibt das 1,3-Diboretan 4b, mit Ph3PAuCl wird bei −50°C die Monogold-Verbindung 5a, bei 0°C die Digold-Verbindung 5b mit geminalen Auryl-Gruppen gebildet. 4a und 4c sind gefaltete 1,3-Diboretane, 4a′, 5a und 5b mit jeweils geminalen Me3Si-Gruppen sind nahezu planar. Trimethylsilyl- and Triphenylphosphineauryl-Substituted 1,3-Diboretanes The reaction of 1,3-bis(diisopropylamino)-2,4-bis(trimethylsilyl)-1,3-dihydro-1,3-diborete (3) with potassium or lithium in THF leads to 2K+ (3)2− or yellow 2Li+ (3)2−, which are protonated with HN(SiMe3)2 to yield the 1,3-diboretane 4a. (3)2− and CH2Br2 form the isomer 4a′ having geminal Me3Si groups. 3 is hydrogenated with H2/Pd to 4a, likewise the 1,3-bis(diisopropylamino)-1,3-dihydro-1,3-diborete yields the 1,3-diboretane 4c. Reaction of (3)2− with CH3I leads to the 1,3-diboretane 4b, with Ph3PAuCl at −50°C the monogold compound 5a, at 0°C the digold compound 5b with geminal auryl groups are formed. 4a und 4c are folded 1,3-diboretanes, whereas 4a′, 5a, and 5b, each having geminal Me3Si groups, are almost planar." @default.
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- W2046553921 date "1989-10-01" @default.
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- W2046553921 title "Trimethylsilyl‐ und Triphenylphosphanauryl‐substituierte 1,3‐Diboretane" @default.
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- W2046553921 doi "https://doi.org/10.1002/cber.19891221009" @default.
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