Within the last year
Within the past 3 years
1 - 10 of 21 articles
Alkyl, allyl, and propargyl β-iodopropionates undergo a cyclopropanation by the reaction with zinc-copper couple and TBDMSCl in THF to give 1-alkoxy-, 1-allyloxy-, and 1-propargyloxy-1- tert -butyldimethylsiloxycyclopropanes in moderate or good yields. β-Iodo-α-methylpropionates 2 and 6...
A series of fourteen derivatives of pyrazole have been calculated at the MP2-6-31G ∗∗ level. The first thirteen are derivatives of the parent pyrazole with different substituents on the nitrogen N(1) and the last one is pyrazole N -oxide. The substituents have been selected to cover a wide...
A successful design for the construction of C 20 gibberellin framework has been described. The key features of the synthesis are as follows: (a) Pd 2+ -promoted cycloalkenylation reaction ( 6 → 5 ) and (b) intramolecular Diels-Alder reaction ( 4 → 3 ).
The solvolysis of 7,7-bis(trifluoromethylsulfonyloxy)-2-norbornene ( 1a ), 1-trifluoromethylsulfonyloxy-1-phenylethylene ( 2a ), 2-methyl-1-cyclohexen-1-yl triflate ( 3a ) and 4-camphenyl triflate ( 4a ) in carbon disulfide or diethyl ether with added MgI 2 and MgBr 2 yields a mixture of the...
A series of mesoionic thiazoles 2 were generated and converted in situ by treating the 5-aminothiazolium chlorides 1 with several electrophilic dipolarophiles in the presence of DBN or NEt 3 . The reactions involved an 1,3-dipolar cycloaddition of the “masked” cyclic azomethine ylides across...
A new approach to produce heterofullerenes is described. Starting from a fullerene with an intact cage which is activated by suitable exohedral functionalization, the first aza-heterofullerene is generated in the gas phase under DCI mass-spectrometric conditions. On the basis of AMI-calculations...
Three novel cyclooctadiazabiaryl ligands, namely cycloocta(2,1−b:3,4−b′)dipyridine (3), cycloocta(2,1−b:3,4−b′)diquinoline (4) and cycloocta(2,1−b:3,4−b′)di(1,8)naphthyridine (5) have been synthesized and a number of metal complexes have been prepared for these novel ligands....
Results are presented on molecular dynamics (MD) simulations of (T ∗ T) dimers linked by a novel chemical functionality — the m ethylene m ethyl i mino (MMI) backbone designed as a neutral replacement for the negatively charged phosphodiester group in wild type nucleic acids. Simultaneous...
( S )-(+)-3′-Fluoroabscisic acid ( 5a ) was synthesized as an analogue of abscisic acid that can resist the metabolic cyclization of 8′-hydroxyabscisic acid to phaseic acid due to increased electron density at C-2′. The inhibitory activity of 5a was slightly higher than that of abscisic...
Read and print from thousands of top scholarly journals.
Sign up with Facebook
Sign up with Google
Already have an account? Log in
Save this article to read later. You can see your Read Later on your DeepDyve homepage.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Sign Up Log In
To subscribe to email alerts, please log in first, or sign up for a DeepDyve account if you don’t already have one.
To get new article updates from a journal on your personalized homepage, please log in first, or sign up for a DeepDyve account if you don’t already have one.