Synthesis of spirocyclic β- and γ-sultams by one-pot reductive cyclization of cyanoalkylsulfonyl fluorides.
Synthesis of spirocyclic β- and γ-sultams by one-pot reductive cyclization of cyanoalkylsulfonyl fluorides.
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DOI:
10.1002/ejoc.202000351
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发表时间:
2021-12-21
影响因子:
2.8
通讯作者:
Zhersh S
中科院分区:
文献类型:
--
作者:
Stepannikova KO;Vashchenko BV;Grygorenko OO;Gorichko MV;Cherepakha AY;Moroz YS;Volovenko YM;Zhersh S
One-pot intramolecular cyclization of novel sp3-enriched cyanoalkylsulfonyl fluorides into spirocyclic β- or γ-sultams is disclosed. The method relies on nitrile group reduction followed by sulfonylation of amino group thus formed upon mild conditions (NaBH4, NiCl2·6H2O in MeOH). Cyclization proceeds smoothly with considerable efficiency (48–84%, 10 examples) on up to 30 g scale. The cyanoalkylsulfonyl fluoride intermediates can be obtained via S-nucleophilic substitution in β-functionalized alkanenitriles or double alkylation of α-alkylthioacetonitrile, followed by oxidative chlorination with Cl2 and further reaction with KHF2. The title mono- and bifunctional sultams are advanced sp3-enriched building blocks for drug discovery and organic synthesis providing novel substitution patterns and frameworks mimicking saturated nitrogen heterocycles such as pyrrolidine/pyrrolidone. Multigram synthesis of spirocyclic γ- and β-sultams – advanced building blocks for organic synthesis and drug discovery – via one-pot reductive cyclization of cyclic cyano sulfonyl fluorides is developed.
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DOI:
10.3390/molecules171214126
发表时间:
2012-11-28
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
de Miranda AS;Bispo Júnior W;da Silva YK;Alexandre-Moreira MS;Castro Rde P;Sabino JR;Lião LM;Lima LM;Barreiro EJ
通讯作者:
Barreiro EJ
影响因子:
7.3
作者:
Cherney, RJ;Mo, RW;Decicco, CP
通讯作者:
Decicco, CP
DOI:
10.1007/bf01998969
发表时间:
1993-07-01
期刊:
AGENTS AND ACTIONS
影响因子:
--
作者:
CARTY, TJ;MARFAT, A;WEISSMAN, A
通讯作者:
WEISSMAN, A
影响因子:
2.8
作者:
Enders, D;Moll, A;Bats, JW
通讯作者:
Bats, JW
影响因子:
1.8
作者:
Enders, D;Wallert, S
通讯作者:
Wallert, S