Abstract
This paper aimed at investigating the reaction of some acyl hydrazides with different terminal dibromoalkanes. This investigation revealed that acyl hydrazide by reacting with 1,4 and 1,5- dibromoalkanes in the presence of DABCO (1,4-diazabicyclo[2.2.2]octane) and TBAB (tetrabutylammonium bromide) underwent a facile intramolecular N2-double-alkylation to form pyrrolidine and piperidine ring derivatives under solvent-free conditions. Moreover, the alkylation of acyl hydrazide with 1,6-dibromohexane as a substrate produced the related N2-mono-alkylated derivatives under the same conditions. Interestingly, using K2CO3 as the base in this reaction for 1,6-dibromohexane led to acyl hydrazide containing an azepane ring. Surprisingly, direct alkylation of 4-nitrobenzohydrazide with 1,2-dibromoethane led to an oxadiazine ring derivative. The product yield was found to be 60- 85% in 6-12 h.
Keywords: Acyl hydrazide, dihaloalkane, heterocyclic compound, organic salt media, solvent-free conditions, medicinal chemistry.
Graphical Abstract
[http://dx.doi.org/10.3390/catal10040429]
[http://dx.doi.org/10.3390/molecules171011469] [PMID: 23018922]
[http://dx.doi.org/10.1016/j.tetlet.2006.07.127]
[http://dx.doi.org/10.1080/00397911.2015.1058396]
[http://dx.doi.org/10.1002/1521-3773(20000901)39:17<2980:AID-ANIE2980>3.0.CO;2-#]
[http://dx.doi.org/10.1021/jo050157f] [PMID: 15960490]
[http://dx.doi.org/10.1021/ja01566a052]
[http://dx.doi.org/10.4155/fmc.09.144] [PMID: 21426184]
[http://dx.doi.org/10.1038/nrc2066] [PMID: 17251919]
[http://dx.doi.org/10.1016/j.pharmthera.2006.10.003]
[http://dx.doi.org/10.1016/j.theochem.2006.11.010]
[http://dx.doi.org/10.1016/j.ejmech.2006.10.015] [PMID: 17184884]
[http://dx.doi.org/10.1021/ja0701154] [PMID: 17348658]
[http://dx.doi.org/10.1016/j.jmb.2006.12.027] [PMID: 17224163]
[http://dx.doi.org/10.1021/ci000026+] [PMID: 11045811]
[http://dx.doi.org/10.1070/RC2003v072n01ABEH000764]
[http://dx.doi.org/10.1016/j.bmc.2008.02.049] [PMID: 18321715]
[http://dx.doi.org/10.1111/j.1747-0285.2009.00776.x] [PMID: 19207467]
[http://dx.doi.org/10.1016/j.bmcl.2007.02.003] [PMID: 17320386]
[http://dx.doi.org/10.3390/11070574] [PMID: 17971729]
[http://dx.doi.org/10.1002/1099-0690(200207)2002:13<2046:AID-EJOC2046>3.0.CO;2-C]
[http://dx.doi.org/10.1016/j.bmc.2007.10.079] [PMID: 18023192]
[http://dx.doi.org/10.1016/j.jpba.2005.01.046] [PMID: 16087048]
[http://dx.doi.org/10.1021/jm4017625] [PMID: 24471928]
[http://dx.doi.org/10.1021/jm501100b] [PMID: 25255204]
[http://dx.doi.org/10.1016/j.tetlet.2004.01.015]
[http://dx.doi.org/10.1016/j.dyepig.2005.04.003]
[http://dx.doi.org/10.1016/0006-2952(89)90476-0] [PMID: 2502119]
[http://dx.doi.org/10.1007/BF02524553]
[http://dx.doi.org/10.1042/bj3080559] [PMID: 7772042]
[http://dx.doi.org/10.1039/C5RA26842G]
[http://dx.doi.org/10.1039/C3CC47967F] [PMID: 24292272]
[http://dx.doi.org/10.1016/j.tetlet.2010.12.083]
[http://dx.doi.org/10.1021/ol048136f] [PMID: 15524481]
[http://dx.doi.org/10.1039/C6OB02099B] [PMID: 27782283]
[http://dx.doi.org/10.1021/jo01277a023] [PMID: 6035704]
[http://dx.doi.org/10.1023/B:RUJO.0000034957.86085.c2]
[http://dx.doi.org/10.1080/10426500490466391]
[http://dx.doi.org/10.1080/104265090508406]
[http://dx.doi.org/10.1134/S1070363216070288]
[http://dx.doi.org/10.1016/j.tet.2015.07.031]
[http://dx.doi.org/10.1080/17518253.2017.1293177]
[http://dx.doi.org/10.1016/j.tet.2016.02.024]
[http://dx.doi.org/10.1016/j.ultsonch.2012.09.003] [PMID: 23084790]
[http://dx.doi.org/10.1007/BF03247234]
[http://dx.doi.org/10.3390/molecules15107353] [PMID: 20966877]
[http://dx.doi.org/10.1002/cjoc.201100351]
[http://dx.doi.org/10.1080/17518253.2016.1250958]
[http://dx.doi.org/10.1021/jo00297a041]