A Sequential Homologation of Alkynes and Aldehydes for Chain Elongation with Optional (13)C-Labeling.
A Sequential Homologation of Alkynes and Aldehydes for Chain Elongation with Optional (13)C-Labeling.
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通过可选的 (13)C 标记对炔烃和醛进行链延长的顺序同系化
DOI:
10.1002/chem.201504248
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Hintermann L
中科院分区:
文献类型:
--
作者:
Brunner A;Hintermann L
Terminal alkynes (RCCH) are homologated by a sequence of ruthenium‐catalyzed anti‐Markovnikov hydration of alkyne to aldehyde (RCH2CHO), followed by Bestmann–Ohira alkynylation of aldehyde to chain‐elongated alkyne (RCH2CCH). Inverting the sequence by starting from aldehyde brings about the reciprocal homologation of aldehydes instead. The use of13C‐labeled Bestmann–Ohira reagent (dimethyl ((1‐13C)‐1‐diazo‐2‐oxopropyl)phosphonate) for alkynylation provides straightforward access to singly or, through additional homologation, multiply13C‐labeled alkynes. The labeled alkynes serve as synthetic platform for accessing a multitude of specifically13C‐labeled products. Terminal alkynes with one or two13C‐labels in the alkyne unit have been submitted to alkyne–azide click reactions; the copper‐catalyzed version (CuAAC) was found to display a regioselectivity of >50 000:1 for the 1,4‐ over the 1,5‐triazine isomer, as shown analytically by13C NMR spectroscopy.
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DOI:
--
发表时间:
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期刊:
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通讯作者:
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DOI:
--
发表时间:
2015
期刊:
Synlett : Accounts and Rapid Communications in Synthetic Organic Chemistry
影响因子:
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