Konformative Beweglichkeit flexibler Ringsysteme. Untersuchungen mit Hilfe der Protonenresonanz-Spektroskopie

Kabuß, S.; Lüttringhaus, Arthur; Friebolin, H.; Mecke, R.

doi:10.1515/znb-1966-0403

Cited by 42 publications

(13 citation statements)

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“…Force field calculations 13, 54 were consistent with a chair conformation for 1,2,3‐trithiane ( 1 ) and suggested that the 2,5‐boat structure was real and the 2,5‐twist structure was a transition state. The R value of 3.33 indicated that the carbocyclic part of the 5‐methyl‐1,2,3‐trithiane is a strongly puckered chair conformer 55–58. The barriers (Δ G ‡ ) to the chair–chair interconversions of 1,2,3‐trithiane ( 1 ), 5,5‐dimethyl‐1,2,3‐trithiane ( 2 ), and several 5,5‐disubstituted‐1,2,3‐trithianes have been determined from NMR studies 55–58.…”

Section: Introductionmentioning

confidence: 99%

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

Coolen

Veening

Wells

et al. 2003

J of Comparative Neurology

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The parvocellular subparafascicular nucleus of the thalamus (SPFp) consists of separate subdivisions, i.e., a medial portion containing galanin-immunoreactive (-IR) axons and a lateral portion containing calcitonin gene related peptide (CGRP)-IR neurons and fibers. These subdivisions appear to have distinct functional roles. In particular, ejaculation-induced Fos expression is expressed in the medial SPFp. Hence, it was hypothesized that medial SPFp is involved in relay of copulation-related information. In contrast, lateral SPFp is involved in the processing of auditory and visual signals involved in fear-conditioned responses. Here we tested the hypothesis that medial and lateral subdivisions of SPFp receive different sets of afferents and that these differences contribute to the separate functional roles of the two subdivisions. Inputs to medial and lateral SPFp were identified following injections of FG restricted to either division in male rats. The medial SPFp receives unique inputs from lumbar spinothalamic cells and brain regions involved in processing of visceral stimuli, supporting the hypothesis that the medial SPFp is involved in the relay of genitosensory information critical for the expression of male sexual behavior. The afferents of the lateral SPFp include brain regions involved in processing of visual and auditory signals and support a role for this subdivision in relay of visual and auditory information. Thus, the two subdivisions of SPFp are anatomically and functionally distinctive.

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Section: Introductionmentioning

confidence: 99%

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

Coolen

Veening

Wells

et al. 2003

J of Comparative Neurology

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“…Others have had a similar experience with 16a; 17 was isolated but only in less than 5 % yield and still containing impurities, including 23. 9 In view of the outcome with 17, further investigation of the known sixmembered disulfide counterpart of 17 (i.e. 23) deserved attention.…”

Section: Resultsmentioning

confidence: 99%

ORGANIC DISULFIDES AND RELATED SUBSTANCES. 48. CYCLIC DI- AND TRISULFIDES BASED ON 1,4-DITHIOLS¹

Singh

Field

Sweetman

1988

Phosphorus and Sulfur and the Related Elements

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“…Experimental work on systems of this type has been limited so far to a determination of the ring reversal barrier of 1 and its 5,5-dimethyl derivative for which AG* = 13.2 and 14.7 kcal/mol, respectively (7), in addition to rather extensive data collection on trimethylene sulfites (2) by such diverse techniques as dipole moments (lb, 8, 9), i.r. (90, lo), n.m.r.…”

Section: Introductionmentioning

confidence: 99%

Vicinal Electron Pairs and Conformation in Six-membered Rings. Some Evidence from the 1,3,2-Dioxathianes

Wood¹,

Srivastava²,

Adlam³

1973

Can. J. Chem.

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Barriers to ring reversal (AC*) at the n.m.r. coalescence temperature are reported for a series of 1,3,2-dioxathianes. The value for 1,3,2-dioxathiane-4,4,6,6-d4 of 11.2 kcal/mol is compared with the corresponding values for cyclohexane and various six-membered rings with and without vicinal electron pairs. The 1 ,3,2-dioxathiane system is suggested as a model for trimethylene sulfites, where the strong preference of the exocyclic oxygen for the axial position interferes with barrier determination by n.m.r. techniques.Les barrieres d'inversion de cycle (AC*) a la temperature de coalescence r.m.n. sont rapportees pour une serie de dioxathianes-1,3,2. La valeur obtenue, 11.2 kcal/mol pour le dioxathiane-1,3,2 d4-4,4,6,6 est comparee avec les valeurs correspondantes pour le cyclohexane et divers systemes cycliques a six membres avec 011 sans paire d'electrons vicinale. Le systcme dioxathiane-1,3,2 est propose comme modele pour I~s sulfites de trimethylene, oh la preference marquee de I'oxygene exocyclique pour la position axiale g6ne la determination de la barriere par la technique du r.m.n.[Traduit par le journal]Can.

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Konformative Beweglichkeit flexibler Ringsysteme. Untersuchungen mit Hilfe der Protonenresonanz-Spektroskopie

Cited by 42 publications

References 0 publications

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

ORGANIC DISULFIDES AND RELATED SUBSTANCES. 48. CYCLIC DI- AND TRISULFIDES BASED ON 1,4-DITHIOLS¹

Vicinal Electron Pairs and Conformation in Six-membered Rings. Some Evidence from the 1,3,2-Dioxathianes

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Konformative Beweglichkeit flexibler Ringsysteme. Untersuchungen mit Hilfe der Protonenresonanz-Spektroskopie

Cited by 42 publications

References 0 publications

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

Afferent connections of the parvocellular subparafascicular thalamic nucleus in the rat: Evidence for functional subdivisions

ORGANIC DISULFIDES AND RELATED SUBSTANCES. 48. CYCLIC DI- AND TRISULFIDES BASED ON 1,4-DITHIOLS1

Vicinal Electron Pairs and Conformation in Six-membered Rings. Some Evidence from the 1,3,2-Dioxathianes

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ORGANIC DISULFIDES AND RELATED SUBSTANCES. 48. CYCLIC DI- AND TRISULFIDES BASED ON 1,4-DITHIOLS¹