𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Complete assignment of the 13C NMR spectra of 4,4-dimethylanthracene-1,9,10(4H)-trione and the regioisomeric monomethyl derivatives

✍ Scribed by Ramiro Araya-Maturana; Wilson Cardona; Tomás Delgado-Castro; Carolina Jullian

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
42 KB
Volume
38
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

The 1 H and 13 C NMR spectra of a set of structurally related tricyclic quinones consisting of 4,4-dimethylanthracene-1,9,10(4H)-trione (1), 4,4,6,7-tetramethylanthracene-1,9,10(4H)-trione (2) and the regioisomers 4,4,5-(3), 4,4,6-(4), 4,4,7-(5) and 4,4,8trimethylanthracene-1,9,10(4H)-trione (6) were assigned completely using two-dimensional techniques.

📜 SIMILAR VOLUMES

Complete assignment of the 13C NMR spect
Complete assignment of the 13C NMR spectra of a series of 5,8-disubstituted 4,4-dimethylanthracene-1,9,10(4H)-triones
✍ Ramiro Araya-Maturana; Bruce K. Cassels; Tomás Delgado-Castro; Claudio Hurtado-G 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 83 KB 👁 2 views

The regiosomeric quinones 5-acetyloxymethyl-4,4,8-trimethyl-( ) and 8-acetyloxymethyl-4,4,5trimethylanthracene-1,9,10(4H)-trione (6) were synthesized and their regiochemistry was assigned on the basis of the unambiguous structure elucidation of 9,10-dihydroxy-5-acetyloxymethyl-4,4,8-trimethyl-5,8-di

Complete assignment of the 1H and 13C NM
Complete assignment of the 1H and 13C NMR spectra of thioquinanthrene and isothioquinanthrene
✍ Andrzej Maślankiewicz; Krystian Pluta; Mirosław Wyszomirski; Adolf Gogoll; Maria 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 189 KB 👁 2 views

The proton and carbon chemical shifts and the coupling constants nJ(H,H) and nJ(C,H) of thioquinanthrene and isothioquinanthrene were completely assigned from COSY, HETCOR and INEPT studies. 1998 ( John Wiley & Sons, Ltd.

Complete assignment of the 1H and 13C NM
Complete assignment of the 1H and 13C NMR spectra of some lignoids from lauraceae
✍ José Maria Barbosa-Filho; Emídio V. Leitão da-Cunha; Marcelo Sobral da Silva 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 101 KB 👁 2 views

An array of one-and two-dimensional NMR techniques (APT, DEPT, COSY, NOESY, HMQC and HMBC) was used to achieve the structural elucidation of some natural benzofuranoid and hydrofuran neolignans isolated from L icaria chrysophylla, L . armeniaca, L . aurea and Nectandra glabrescens fruits. The combin

Complete Assignment of the 1H and 13C NM
Complete Assignment of the 1H and 13C NMR Spectra of Flavone and its A-Ring Hydroxyl Derivatives
✍ Dagfinn W. Aksnes; Arne Standnes; Øyvind M. Andersen 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 286 KB 👁 2 views

Complete assignment of the 'H and I3C NMR spectra of flavone and three flavone derivatives is reported. Protonproton and carbon-proton coupling constants of the flavones, including the extreme seven-bond long-range coupling between H-7 and H-3 in 6-hydroxyflavone (0.52 Hz) and flavone (0.27 Hz), are

Complete Assignment of the 1H and 13C NM
Complete Assignment of the 1H and 13C NMR Spectra of Steroidal Sapogenins: Smilagenin and Sarsasapogenin
✍ Pawan K. Agrawal; Pensri Bunsawansong; Gareth A. Morris 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 257 KB 👁 2 views

Ab initio proton and 13C NMR assignments for a stereoisomeric pair of 5b steroidal sapogenins, smilagenin (1) and sarsasapogenin (2), were accomplished using DEPT, COSY, TOCSY, HETCOR, HMQC, HMQC-TOCSY, HSQC-RELAY, HMBC and selective reverse INEPT techniques ; the 13C NMR assignments for 2 were con-

Total assignment of the 1H and 13C NMR s
Total assignment of the 1H and 13C NMR spectra of casimiroedine and its peracetylated derivative
✍ William F. Reynolds; Raul G. Enriquez; Gil A. Magos; Dino Gnecco 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 51 KB 👁 2 views

The rare alkaloid casimiroedine and its peracetylated derivative both show complex 1 H and 13 C spectra with almost all signals doubled owing to slow rotation about the amide bond. Nevertheless, it is possible, using 2D NMR methods, to assign fully the 1 H and 13 C spectra of the major and minor con