2002
DOI: 10.1002/1099-0682(200206)2002:6<1293::aid-ejic1293>3.3.co;2-u
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Abstract: Keywords: Alkynes / Boranes / Boron / Catechol / HydroborationThe treatment of 3,3-dimethyl-1-butynyllithium with boron trichloride followed by double hydroboration with HBCl 2 afforded 1,1,1-tris(dichloroboryl)-3,3-dimethylbutane (1a), characterized as its catechol derivative 1b. Analogously, three isomers (3a, 4a, and 5a) were obtained with trimethylsilylacetylide and identified as catechol derivatives 3b, 4b, and 5b. On heating, 1a formed 2,3,4-trichloro-1,5-dicarba-closopentaborane(5) (6a) with elimination… Show more

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Cited by 1 publication
(3 citation statements)
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References 12 publications
(27 reference statements)
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“…For the synthesis of 9a, the tris(dichloroboryl)neopentylmethane (18a) is needed [13]. It is obtained via lithiation of 3,3-dimethyl-1-butyne, followed by boron/lithium exchange to give the intermediate Me 3 C-C≡C-BCl 2 , which then is hydroborated with HBCl 2 prepared in situ.…”
Section: Closo-and Nido-carboranesmentioning
confidence: 99%
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“…For the synthesis of 9a, the tris(dichloroboryl)neopentylmethane (18a) is needed [13]. It is obtained via lithiation of 3,3-dimethyl-1-butyne, followed by boron/lithium exchange to give the intermediate Me 3 C-C≡C-BCl 2 , which then is hydroborated with HBCl 2 prepared in situ.…”
Section: Closo-and Nido-carboranesmentioning
confidence: 99%
“…The 11 B NMR signal of 9b is shifted to δ = 17.3. Further replacements of the chloro substituents of 9a were possible with Me 3 CC 2 Li, PhC 2 Li, and Me 3 SiNMe 2 to give the tris(acetylenic) derivatives 9c and 9d, as well as the trisamino compound 9e [13].…”
Section: W Siebert Et Almentioning
confidence: 99%
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