𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Complete assignment of the 13C NMR spectra of a series of 5,8-disubstituted 4,4-dimethylanthracene-1,9,10(4H)-triones

✍ Scribed by Ramiro Araya-Maturana; Bruce K. Cassels; Tomás Delgado-Castro; Claudio Hurtado-Guzmán; Carolina Jullian

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
83 KB
Volume
37
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

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-dihydroanthracen-1(4H)-one (2), the precursor of 5. The 1H and 13C NMR spectra of these compounds were assigned completely using two-dimensional techniques. These interpretations were used for the total assignment of the NMR spectra of the closely related 5-hydroxymethyl-and 5-formyl-4,4,8-trimethylanthracene-1,9,10(4H)-triones (7 and 8, respectively).

📜 SIMILAR VOLUMES

Complete assignment of the 13C NMR spect
Complete assignment of the 13C NMR spectra of 4,4-dimethylanthracene-1,9,10(4H)-trione and the regioisomeric monomethyl derivatives
✍ Ramiro Araya-Maturana; Wilson Cardona; Tomás Delgado-Castro; Carolina Jullian 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 42 KB

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) wer

Complete 1H and 13C NMR spectral assignm
Complete 1H and 13C NMR spectral assignment of 6,7,8,9-tetrahydro-7,7-dimethyldioxolo[5,4-b]acridin-9-one using FUCOUP
✍ Cláudia J. Nascimento; Elizabete R. Cruz; J. Daniel Figueroa-Villar 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 91 KB 👁 1 views

Unambiguous 1H and 13C chemical shift assignments of the novel antibiotic 6,7,8,9-tetrahydro-7,7dimethyl-dioxolo [5,4-b]acridin-9-one were made using the FUCOUP pulse sequence. The appropriate phase cycling was calculated using the Compact Cartesian Coordinate Product Operator (C3PO) method. Copyrig

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-

Complete assignment of 1H and 13C NMR da
Complete assignment of 1H and 13C NMR data and establishment of the relative stereochemistry of C-1-functionalized 2,4-dimethyl-8-oxabicyclo[3.2.1] oct-6-en-3-one derivatives
✍ Angel M. Montaña; Pedro M. Grima; Francisca García 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 66 KB 👁 2 views

The total assignment of the 1 H and 13 C NMR spectra of 24 cis-endo and 15 cis-exo diastereoisomers of C-1-substituted 2,4-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives was deduced from the concerted application of DEPT, COSY, HETCOR, HMBC, HMQC and PS-NOESY experiments. The relative stereo

1H and 13C NMR assignments of a lipopoly
1H and 13C NMR assignments of a lipopolysaccharide obtained from the deep rough mutant of Escherichia coli D31m4
✍ Pawan K. Agrawal; C. Allen Bush; Nilofer Qureshi; Kuni Takayama 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 305 KB 👁 1 views

The hexamethyl derivative of lipopolysaccharide (LPS), obtained by diazomethane methylation of LPS extracted from a deep mutant of Escherichia coli D31m4, followed by high-performance liquid chromatographic puriÐcation, was subjected to homo-and heteronuclear two-dimensional NMR spectroscopy (DQF-CO