1
|
Todd M, Hrdina R. Synthesis of 1,2-Disubstituted Adamantane Derivatives by Construction of the Adamantane Framework. Molecules 2023; 28:7636. [PMID: 38005358 PMCID: PMC10675813 DOI: 10.3390/molecules28227636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
This review summarizes achievements in the synthesis of 1,2-disubstituted adamantane derivatives by the construction of the tricyclic framework either by total synthesis or by ring expansion/contraction reactions of corresponding adamantane homologues. It is intended to complement reviews focusing on the preparation of 1,2-disubstituted derivatives by C-H functionalization methods.
Collapse
Affiliation(s)
| | - Radim Hrdina
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 12043 Praha, Czech Republic;
| |
Collapse
|
2
|
Shiryaev VA, Sokolova IV, Gorbachova AM, Rybakov VB, Shiryaev AK, Klimochkin YN. Convenient synthesis of endo,endo- and endo,exo-bicyclo[3.3.1]nonane diamines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
3
|
Baleeva NS, Rybakov VB, Ivleva EA, Shiryaev VA, Klimochkin YN. Synthesis and Chemical Transformations of 7-Hydroxybicyclo[3.3.1]nonane-3-carbohydrazide. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428020110081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Smaligo AJ, Swain M, Quintana JC, Tan MF, Kim DA, Kwon O. Hydrodealkenylative C(sp 3)-C(sp 2) bond fragmentation. Science 2019; 364:681-685. [PMID: 31097667 DOI: 10.1126/science.aaw4212] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/14/2019] [Indexed: 12/19/2022]
Abstract
Chemical synthesis typically relies on reactions that generate complexity through elaboration of simple starting materials. Less common are deconstructive strategies toward complexity-particularly those involving carbon-carbon bond scission. Here, we introduce one such transformation: the hydrodealkenylative cleavage of C(sp3)-C(sp2) bonds, conducted below room temperature, using ozone, an iron salt, and a hydrogen atom donor. These reactions are performed in nonanhydrous solvents and open to the air; reach completion within 30 minutes; and deliver their products in high yields, even on decagram scales. We have used this broadly functionality tolerant transformation to produce desirable synthetic intermediates, many of which are optically active, from abundantly available terpenes and terpenoid-derived precursors. We have also applied it in the formal total syntheses of complex molecules.
Collapse
Affiliation(s)
- Andrew J Smaligo
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Manisha Swain
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jason C Quintana
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Mikayla F Tan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Danielle A Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| |
Collapse
|
5
|
Fast Amide Bond Cleavage Assisted by a Secondary Amino and a Carboxyl Group-A Model for yet Unknown Peptidases? Molecules 2019; 24:molecules24030572. [PMID: 30764512 PMCID: PMC6384577 DOI: 10.3390/molecules24030572] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 12/13/2022] Open
Abstract
Unconstrained amides that undergo fast hydrolysis under mild conditions are valuable sources of information about how amide bonds may be activated in enzymatic transformations. We report a compound possessing an unconstrained amide bond surrounded by an amino and a carboxyl group, each mounted in close proximity on a bicyclic scaffold. Fast amide hydrolysis of this model compound was found to depend on the presence of both the amino and carboxyl functions, and to involve a proton transfer in the rate-limiting step. Possible mechanisms for the hydrolytic cleavage and their relevance to peptide bond cleavage catalyzed by natural enzymes are discussed. Experimental observations suggest that the most probable mechanisms of the model compound hydrolysis might include a twisted amide intermediate and a rate-determining proton transfer.
Collapse
|
6
|
Wilde MJ, West CE, Scarlett AG, Jones D, Frank RA, Hewitt LM, Rowland SJ. Bicyclic naphthenic acids in oil sands process water: Identification by comprehensive multidimensional gas chromatography–mass spectrometry. J Chromatogr A 2015; 1378:74-87. [DOI: 10.1016/j.chroma.2014.12.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 11/30/2014] [Accepted: 12/03/2014] [Indexed: 11/15/2022]
|
7
|
Zoidis G, Sandoval A, Pineda-Farias JB, Granados-Soto V, Felix R. Anti-allodynic effect of 2-(aminomethyl)adamantane-1-carboxylic acid in a rat model of neuropathic pain: a mechanism dependent on CaV2.2 channel inhibition. Bioorg Med Chem 2014; 22:1797-803. [PMID: 24582401 DOI: 10.1016/j.bmc.2014.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/29/2014] [Accepted: 02/07/2014] [Indexed: 10/25/2022]
Abstract
Neuropathic pain is a serious physical disabling condition resulting from lesion or dysfunction of the peripheral sensory nervous system. Despite the fact that the mechanisms underlying neuropathic pain are poorly understood, the involvement of voltage-gated calcium (Ca(V)) channels in its pathophysiology has justified the use of drugs that bind the Ca(V) channel α₂δ auxiliary subunit, such as gabapentin (GBP), to attain analgesic and anti-allodynic effects in models involving neuronal sensitization and nerve injury. GBP binding to α₂δ inhibits nerve injury-induced trafficking of the α₁ pore forming subunits of Ca(V) channels, particularly of the N-type, from the cytoplasm to the plasma membrane of pre-synaptic terminals in dorsal root ganglion neurons and dorsal horn spinal neurons. In the search for alternative forms of treatment, in this study we describe the synthesis and pharmacological profile of a GABA derivative, 2-aminoadamantane-1-carboxylic acid (GZ4), which displays a close structure-activity relationship with GBP. Behavioral assessment using von Frey filament stimuli showed that GZ4 treatment reverted mechanical allodynia/hyperalgesia in an animal model of spinal nerve ligation-induced neuropathic pain. In addition, using the patch clamp technique we show that GZ4 treatment significantly decreased whole-cell currents through N-type Ca(V) channels heterologously expressed in HEK-293 cells. Interestingly, the behavioral and electrophysiological time course of GZ4 actions reflects that its mechanism of action is similar but not identical to that of GBP. While GBP actions require at least 24 h and imply uptake of the drug, which suggests that the drug acts mainly intracellularly affecting channels trafficking to the plasma membrane, the faster time course (1-3 h) of GZ4 effects suggests also a direct inhibition of Ca(2+) currents acting on cell surface channels.
Collapse
Affiliation(s)
- Grigoris Zoidis
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, University of Athens, Panepistimioupoli-Zografou, GR-15771 Athens, Greece.
| | - Alejandro Sandoval
- School of Medicine FES Iztacala, National Autonomous University of Mexico (UNAM), Tlalnepantla, Mexico
| | - Jorge Baruch Pineda-Farias
- Departmento de Farmacobiología, Centro de Investigación y de Estudios Avanzados (Cinvestav), Sede Sur., México, D.F., Mexico
| | - Vinicio Granados-Soto
- Departmento de Farmacobiología, Centro de Investigación y de Estudios Avanzados (Cinvestav), Sede Sur., México, D.F., Mexico
| | - Ricardo Felix
- Department of Cell Biology, Cinvestav, Mexico City, Mexico.
| |
Collapse
|
8
|
Rowland SJ, Clough R, West CE, Scarlett AG, Jones D, Thompson S. Synthesis and mass spectrometry of some tri- and tetracyclic naphthenic acids. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:2573-2578. [PMID: 21910292 DOI: 10.1002/rcm.5153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
|
9
|
Rowland SJ, West CE, Scarlett AG, Jones D, Frank RA. Identification of individual tetra- and pentacyclic naphthenic acids in oil sands process water by comprehensive two-dimensional gas chromatography/mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:1198-204. [PMID: 21488118 DOI: 10.1002/rcm.4977] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The oils sands industry of Canada produces large volumes of process water (OSPW) which is stored in large lagoons. The OSPW contains complex mixtures of somewhat toxic, water-soluble, acid-extractable organic matter sometimes called 'naphthenic acids' (NA). Concerns have been raised over the possible environmental impacts of leakage of OSPW and a need has therefore arisen for better characterisation of the NA. Recently, we reported the first identification of numerous individual tricyclic NA in OSPW by comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GCxGC/ToF-MS) of the methyl esters. The acids were diamondoid adamantane acids, resulting, it was proposed, from biotransformation of the corresponding alkyladamantane hydrocarbons, which is a known process. Biotransformation of higher alkylated diamondoid hydrocarbons was, until now, unknown but here we describe the identification of numerous pentacyclic NA as diamantane and alkyldiamantane acids, using the same methods. Further, we suggest tentative structures for some of the tetracyclic acids formed, we propose, by ring-opening of alkyldiamantanes. We suggest that this is further evidence that some of the acid-extractable organic matter in the OSPW originates from extensive biodegradation of the oil, whether in-reservoir or environmental, although other oxidative routes (e.g. processing) may also be possible. The results may be important for helping to better focus reclamation and remediation strategies for NA and for facilitating the identification of the sources of NA in contaminated environmental samples.
Collapse
Affiliation(s)
- Steven J Rowland
- Biogeochemistry Research Centre, University of Plymouth, Drake Circus, Plymouth, UK.
| | | | | | | | | |
Collapse
|
10
|
Peters JA, Kieboom APG. Multinuclear magnetic resonance in the presence of lanthanide(III) as analytical tool for structure determination in solution. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19831020901] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
11
|
|
12
|
Tang Y, Dong Y, Wang X, Sriraghavan K, Wood JK, Vennerstrom JL. Dispiro-1,2,4-trioxane analogues of a prototype dispiro-1,2,4-trioxolane: mechanistic comparators for artemisinin in the context of reaction pathways with iron(II). J Org Chem 2005; 70:5103-10. [PMID: 15960511 DOI: 10.1021/jo050385+] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Single electron reduction of the 1,2,4-trioxane heterocycle of artemisinin (1) forms primary and secondary carbon-centered radicals. The complex structure of 1 does not lend itself to a satisfactory dissection of the electronic and steric effects that influence the formation and subsequent reaction of these carbon-centered free radicals. To help demarcate these effects, we characterized the reactions of achiral dispiro-1,2,4-trioxolane 4 and dispiro-1,2,4-trioxanes 5-7 with ferrous bromide and 4-oxo-TEMPO. Our results suggest a small preference for attack of Fe(II) on the nonketal peroxide oxygen atom of 1. For 4, but not for 5 and 6, there was a strong preference for attack of Fe(II) on the less hindered peroxide bond oxygen atom. The steric hindrance afforded by a spiroadamantane in a five-membered trioxolane is evidently much greater than that for a corresponding six-membered trioxane. Unlike 1, 5-7 fragment by entropically favored beta-scission pathways forming relatively stable alpha-oxa carbon-centered radicals. These data suggest that formation of either primary or secondary carbon-centered radicals is a necessary but insufficient criterion for antimalarial activity of 1 and synthetic peroxides.
Collapse
Affiliation(s)
- Yuanqing Tang
- College of Pharmacy, University of Nebraska Medical Center, 986025 Nebraska Medical Center, Omaha, NE 68198-6025, USA
| | | | | | | | | | | |
Collapse
|
13
|
Gambacorta A, Tofani D, Tafi A, Farah ME. Chair–boat equilibrium as driving force in epimerization of 3,7-dimethylbicyclo[3.3.1]nonan-2,9-dione derivatives. Stereocontrolled synthesis of the 3- exo ,7 -exo - and 3- endo ,7- exo -dimethylbicyclo[3.3.1]nonan-9-ones. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00445-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
Synthesis of Polysubstituted Bicyclo[3.3.1]nonane-3,7-diones from Cyclohexa-2,5-dienones and Dimethyl 1,3-Acetonedicarboxylate. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00680-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
15
|
|
16
|
Intramolecular photoinduced electron transfer: A dimethylaniline constrained to the face of a naphthalene through a bicyclic scaffold. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)10091-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Intramolecular carboxylate capture of an intermediate in aromatic electrophilic substitution. The 8,9,10,11-tetrahydro-7.11-methano-7H-cycloocta[de]naphthalene-9-endo-carboxylic acid system. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01607-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Chen YS, Kampf JW, Lawton RG. Aromatic stacking in folded architectures through hydrogen bonding. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01318-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
19
|
The crystal and molecular structure of 2-methyl-2,5-diaza-3,4-benzotricyclo[4.3.3.01,5]dodecan-6-ol. Struct Chem 1997. [DOI: 10.1007/bf02252972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
20
|
Camps P, Font-Bardia M, Muñoz-Torrero D, Solans X. Synthesis of bridgehead polycyclic 1,2-diamines and 2-amino alcohol derivatives as Rigid acetylcholine analogs. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
21
|
Srikrishna A, Hemamalini P, Venkateswarlu S. A regiospecific radical annulation strategy to functionalised chiral bicyclo[3.3.l]nonanes. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)85352-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
22
|
Momose T, Itooka T, Nishi T, Uchimoto M, Ohnishi K, Muraoka O. Bicyclo[3.3.1]nonanes as synthetic intermediates XIII. Tetrahedron 1987. [DOI: 10.1016/s0040-4020(01)86859-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
23
|
Dombi G, Mattinen J, Pihlaja K, Czombos J. Configurations and conformations of isomeric 3-methyl-2,4-dioxabicyclo [3.3.1]nonanes - their preparation and multinuclear and 2d nmr study. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)90618-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
24
|
Neugebauer FA, Fischer H, Siegel R, Krieger C. 2,4-Dialkylsubstituierte Carbono- und Thiocarbonohydrazide, Reaktionen mit Carbonylverbindungen. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/cber.19831161019] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
25
|
Peters J, van Ballegoyen-Eekhout G, van De Graaf B, Bovée W, Bass J, van Bekkum H. Synthesis and conformational analysis of the three 3,7-dimethylbicyclo[3.3.1]nonanes. Tetrahedron 1983. [DOI: 10.1016/s0040-4020(01)88576-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
26
|
Transformed steroids. 123. Synthesis of 5α(H)- and 5α(OH)-6-ketosteroids with an additional 17α,20ξ-dihydroxytetrahydropyran ring E. Chem Nat Compd 1982. [DOI: 10.1007/bf00581598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
27
|
|
28
|
Peters J, van de Graaf B, Schuyl P, Knol-Kalkman A, van Leersum A, van Bekkum H. The electron impact induced fragmentations of the four isomeric. Tetrahedron 1982. [DOI: 10.1016/0040-4020(82)85060-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
29
|
Organoboron compounds. Russ Chem Bull 1981. [DOI: 10.1007/bf00953578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
30
|
Krow GR. Nitrogen insertion reactions of bridged bicyclic ketones. Regioselective lactam formation. Tetrahedron 1981. [DOI: 10.1016/s0040-4020(01)92445-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
31
|
|
32
|
|
33
|
Raber DJ, Janks CM, Johnston MD, Raber NK. Structure elucidation with lanthanide induced shifts. 9. bicyclo[3.3.1]nonan-9-one. Tetrahedron Lett 1980. [DOI: 10.1016/s0040-4039(00)71443-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
34
|
Peters J, Bovée W, Cranenburgh PV, van Bekkum H. Boat-chair conformation of 2,4-dioxabicyclo[3.3.1]nonane. Tetrahedron Lett 1979. [DOI: 10.1016/s0040-4039(01)86346-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
35
|
Garbers C, Spies H, Visagie HE, Boeyens J, Chalmers A. Electrophilic addition of dichloromethylmthyl ether to dienes. A new annulating procedure. Tetrahedron Lett 1978. [DOI: 10.1016/s0040-4039(01)88989-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
36
|
|
37
|
Conformational analysis of 7-alkyl-3-oxabicyclo-[3.3.1]nonanes and complexes with lanthanide shift reagents. Tetrahedron 1978. [DOI: 10.1016/0040-4020(78)89031-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
38
|
|
39
|
|
40
|
|
41
|
|
42
|
Mehta G, Pandey PN, Usha R, Venkatesan K. A novel 1,3-bishomocubane → brendane transformation. Tetrahedron Lett 1976. [DOI: 10.1016/s0040-4039(00)74637-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
43
|
Peters J, van de Graaf B, Schuyl P, Wortel T, van Bekkum H. The electron impact induced fragmentations of some 7-alkyl-3-oxabicyclo[3.3.1]nonanes. Tetrahedron 1976. [DOI: 10.1016/0040-4020(76)80115-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|