Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1975 1
1989 1
1996 1
2000 1
2001 1
2002 1
2004 2
2005 1
2006 1
2007 1
2008 3
2009 3
2010 5
2011 1
2012 3
2013 1
2014 2
2015 2
2016 2
2018 2
2019 4
2020 4
2021 3
2022 3
2023 3
2024 4

Text availability

Article attribute

Article type

Publication date

Search Results

52 results

Results by year

Filters applied: . Clear all
Page 1
Response to the letters to the editor of S. Benkhaled et al. and C.H. Rim regarding the article "Stereotactic radiosurgery versus whole-brain radiotherapy in patients with 4-10 brain metastases: A nonrandomized controlled trial" by Bodensohn et al.
Bodensohn R, Niyazi M. Bodensohn R, et al. Radiother Oncol. 2023 Dec;189:109888. doi: 10.1016/j.radonc.2023.109888. Epub 2023 Sep 9. Radiother Oncol. 2023. PMID: 37690665 Clinical Trial. No abstract available.
Multiple C-H Bond Activations in Corannulene by a Dirhenium Complex.
Adams RD, Dhull P, Pennachio M, Petrukhina MA, Smith MD. Adams RD, et al. Chemistry. 2019 Mar 15;25(16):4234-4239. doi: 10.1002/chem.201806405. Epub 2019 Feb 18. Chemistry. 2019. PMID: 30773724
Compound 2 reacts with a second equivalent of 1 to yield three isomeric doubly metalated corannulene products: Re(2) (CO)(8) (mu-H)(mu-eta(2) -1,2-mu-eta(2) -10,11-C(20) H(8) )Re(2) (CO)(8) (mu-H), 3 (35 % yield), Re(2) (CO)(8) (mu-H)(mu-eta(2) -2,1-mu-eta(2) -10,11-C(20) H(8) )R …
Compound 2 reacts with a second equivalent of 1 to yield three isomeric doubly metalated corannulene products: Re(2) (CO)(8) (mu-H)(mu-eta(2 …
Zirconium and titanium amido complexes with 3,3-dimethyl-1,5-diaza-8-oxacyclodecane; facile C-H activation of the macrocyclic rim.
Porter RM, Danopoulos AA, Reid G, Titcomb LR. Porter RM, et al. Dalton Trans. 2005 Feb 7;(3):427-8. doi: 10.1039/b418431a. Epub 2005 Jan 4. Dalton Trans. 2005. PMID: 15672183
Reaction of the dilithium salt of 3,3-dimethyl-1,5-diaza-8-oxacyclodecane, [(NLi)2O], with Zr(NEt2)2Cl2(thf)2 gave the formally 20e- complex [Zr(N2O)2]; metallation of the macrocycle [(NH)2O], with Ti(benzyl)4 gave rise to [(N2O)*Ti(benzyl)]2 in which the trianionic diamido (N2O) …
Reaction of the dilithium salt of 3,3-dimethyl-1,5-diaza-8-oxacyclodecane, [(NLi)2O], with Zr(NEt2)2Cl2(thf)2 gave the formally 20e- complex …
Homo- and Heteromultinuclear Pseudocapsules Assembled from Calix[6]-mono-crown-5 and Alkali Metal Ions.
Kim S, Oh J, Park KM, Lee SS, Park IH. Kim S, et al. Inorg Chem. 2023 Jun 5;62(22):8692-8699. doi: 10.1021/acs.inorgchem.3c00875. Epub 2023 May 22. Inorg Chem. 2023. PMID: 37216644
H(4)L reacts with KOH to yield a hexanuclear potassium(I) complex [K(6)(HL)(2)(CH(3)OH)(2)].CHCl(3) (1) in which two bowl-shaped tripotassium(I) complex units are linked in a rim-to-rim fashion via the interligand C-H...pi interactions. In the same rea …
H(4)L reacts with KOH to yield a hexanuclear potassium(I) complex [K(6)(HL)(2)(CH(3)OH)(2)].CHCl(3) (1) in which two bowl-shaped tripotassiu …
Pd-catalyzed benzylic C-H oxidation of cyclotriveratrylene--product diversity.
Senthilkumar B, Gonnade RG, Ramana CV. Senthilkumar B, et al. Org Biomol Chem. 2015 Feb 28;13(8):2323-9. doi: 10.1039/c4ob02469a. Org Biomol Chem. 2015. PMID: 25557415
The inner-rim functionalization of CTV has been examined by employing Pd-catalyzed benzylic oxidation. ...
The inner-rim functionalization of CTV has been examined by employing Pd-catalyzed benzylic oxidation. ...
p-tert-Butylcalix[4]arene complexes of molybdenum and tungsten: reactivity of the calixarene methylene C-H bond and the facile migration of the metal around the phenolic rim of the calixarene.
Buccella D, Parkin G. Buccella D, et al. J Am Chem Soc. 2006 Dec 20;128(50):16358-64. doi: 10.1021/ja066457b. J Am Chem Soc. 2006. PMID: 17165791
p-tert-Butylcalix[4]arene, [CalixBut(OH)4], reacts with Mo(PMe3)6 and W(PMe3)4(eta2-CH2PMe2)H to yield compounds of composition {[CalixBut(OH)2(O)2]M(PMe3)3H2} which exhibit unprecedented use of a C-H bond of a calixarene methylene group as a binding functionality i …
p-tert-Butylcalix[4]arene, [CalixBut(OH)4], reacts with Mo(PMe3)6 and W(PMe3)4(eta2-CH2PMe2)H to yield compounds of composition {[CalixBut(O …
Switchable Regioselective C-H Activation/Annulation of Acrylamides with Alkynes for the Synthesis of 2-Pyridones.
Chen C, Chen Y, Han Z, Huang Y, Wang Y, Tao X, Wang L, Chen X, Long R, Yang Y, Zhu W, Zhou B. Chen C, et al. ChemSusChem. 2024 Apr 24:e202400066. doi: 10.1002/cssc.202400066. Online ahead of print. ChemSusChem. 2024. PMID: 38656829
A catalyst-based switchable regioselective C-H activation/annulation of acrylamides with propargyl carbonates has been developed, delivering C5 or C6 alkenyl substituted 2-pyridones. ...
A catalyst-based switchable regioselective C-H activation/annulation of acrylamides with propargyl carbonates has been develop …
Regiospecific functionalization of azacalixaromatics through copper-mediated aryl C-H activation and C-O bond formation.
Wang ZL, Zhao L, Wang MX. Wang ZL, et al. Org Lett. 2011 Dec 16;13(24):6560-3. doi: 10.1021/ol202874n. Epub 2011 Nov 23. Org Lett. 2011. PMID: 22111892
Regiospecific functionalization of tetraazacalix[1]arene[3]pyridines at the lower rim position of the benzene ring was achieved conveniently from their cross-coupling reaction with both aliphatic alcohols including chiral primary and secondary alcohols and phenol derivativ …
Regiospecific functionalization of tetraazacalix[1]arene[3]pyridines at the lower rim position of the benzene ring was achieved conve …
Bronsted acid- and Ni(II)-catalyzed C-H oxidation/rearrangement of cyclotriveratrylenes (CTVs) to cyclic and acyclic quinones as potential anti-cancer agents.
Darole RS, Choudhary SS, Sharma H, Mali BP, Gopu B, Vanka K, Senthilkumar B. Darole RS, et al. Org Biomol Chem. 2024 Jan 31;22(5):1038-1046. doi: 10.1039/d3ob01428b. Org Biomol Chem. 2024. PMID: 38197499
This paper describes a simple and practical protocol for the direct synthesis of acyclic and cyclic quinone derivatives via an acid-promoted nickel(II)-catalyzed inner rim C-H oxidation of cyclotriveratrylene (CTV) and its analogues. ...The DFT calculations s …
This paper describes a simple and practical protocol for the direct synthesis of acyclic and cyclic quinone derivatives via an acid-promoted …
25-Allyloxy-5,11,17,23-tetra-tert-butyl-26,27,28-trihydroxycalix[4]arene chloroform disolvate.
Gruber T, Eissmann F, Seichter W, Weber E. Gruber T, et al. Acta Crystallogr C. 2010 Jul;66(Pt 7):o334-6. doi: 10.1107/S0108270110020858. Epub 2010 Jun 5. Acta Crystallogr C. 2010. PMID: 20603559 Free article.
In the title solvated calixarene, C(47)H(60)O(4) x 2 CHCl(3), the host chalice displays an almost undistorted cone conformation, stabilized by three strong O-H...O hydrogen bonds at the calixarene's lower rim. One chloroform solvent molecule is fixed in the calixarene cavi …
In the title solvated calixarene, C(47)H(60)O(4) x 2 CHCl(3), the host chalice displays an almost undistorted cone conformation, stabilized …
52 results