Results 11 to 20 of about 1,765 (123)

The Regioselective Arylation of 1,3‐Benzodioxoles [PDF]

Advanced Synthesis & Catalysis, 2021
AbstractThe direct arylation of 1,3‐benzodioxole and 2,2‐difluorobenzo[1,3]dioxole with 26 different aryl bromides yields the respective 4‐substitued products in yields of >80% requiring between 0.05–1 mol % Na2PdCl4, 30 mol % pivalic acid, 1.3 equivs. K2CO3 and ca. 250 equivs. of diethylacetamide per Pd at T=120 °C.
Yuki Kanai, Dorian Müller‐Borges, Herbert Plenio   +2 more
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1,3-Benzodioxol-5-ylmethanol [PDF]

Acta Crystallographica Section E Structure Reports Online, 2007
The title compound, C8H8O3, is an acid-protecting group used in the synthesis of peptides and as an accelerator in polymerization reactions. Its oxidation product, piperonal (heliotropine), is used in the flavouring and perfume industries. All the non-H atoms, except the O atom of the hydroxyl group, are coplanar (r.m.s. deviation 0.028 A). The crystal
Yathirajan, H. S., Bindya, S., Ashok, M. A., Narayana, B., Bolte, Michael   +4 more
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1-(1,3-Benzodioxol-5-yl)ethanone [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
In the title compound, C(9)H(8)O(3), the dihedral angle between the mean planes of the benzene and dioxole rings is 1.4 (8)°, with the dioxole group in a slightly distorted envelope configuration with the flap C atom displaced by 0.0645 Å from the plane through the other four atoms. In the crystal, weak inter-molecular C-H⋯O hydrogen-bond inter-actions
Jasinski, Jerry P., Butcher, Ray J., Hakim Al-arique, Q. N. M., Yathirajan, H. S., Narayana, B.   +4 more
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1,3-Benzodioxol-2-one

Acta Crystallographica Section E Structure Reports Online, 2007
The title compound, C7H4O3, is the first cyclic carbonate of an aromatic diol whose structure has been elucidated by means of single-crystal X-ray analysis. The mol­ecule possesses crystallographic twofold rotation symmetry and non-crystallographic C2v symmetry. The C—O single bonds are slightly longer than those in comparable cyclic carbonates derived
Richard Betz, Peter Klüfers
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2,2-Bis(pentafluorophenyloxy)-1,3-benzodioxole

Acta Crystallographica Section E Structure Reports Online, 2007
The title compound, C19H4F10O4, an orthocarbonate of a vicincal aromatic diol and two monofunctional aromatic alcohols, was prepared for the purpose of collecting NMR data on orthocarbonates and for comparison with similar silicon compounds. The mol­ecule does not exhibit any crystallographic symmetry.
Richard Betz, Peter Klüfers, Moritz M. Reichvilser   +2 more
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6-Hydroxy-2H-1,3-benzodioxole-5-carbaldehyde [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
The title compound, C(8)H(6)O(4), crystallizes with two independent mol-ecules in the asymmetric unit. The benzodioxole ring system is almost planar in each mol-ecule, with maximum deviations of 0.008 (1) and 0.007 (1) Å. The mol-ecular structure is characterized by strong electrostatic intra-molecular O⋯O contacts [2.649 (3) Å] and intra-molecular O-H⋯
Muhammad D. Bala, Deresh Ramjugernath, Neil Koorbanally, Mehbub I. K. Momin   +3 more
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2-(1,3-Benzodioxol-5-yl)-1H-benzimidazole [PDF]

Acta Crystallographica Section E Structure Reports Online, 2014
The asymmetric unit of the title compound, C14H10N2O2, contains two independent molecules. In each molecule, the benzodioxole ring system displays an envelope conformation, with the methylene C atom located at the flap deviating by 0.081 (2) and 0.230 (2) Å from the mean plane formed by the other atoms.
Nadir Ghichi, Mohamed Amine Benaouida, Ali Benosmane, Ali Benboudiaf, Hocine Mérazig   +4 more
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Improved Process for the Continuous Acylation of 1,3-Benzodioxole

Molecules
The acylation of 1,3-benzodioxole was studied in a continuous process using a recyclable heterogeneous substoichiometric catalyst. In a short time period (30 min), at 100 °C, the conversion rate was 73%, with a selectivity of 62% of the desired acylated product; the reaction was run continuously for 6 h, showing excellent stability and selectivity ...
Davide Pollon, Francesca Annunziata, Stefano Paganelli, Lucia Tamborini, Andrea Pinto, Sabrina Fabris, Maria Antonietta Baldo, Oreste Piccolo   +7 more
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5-(1H-Inden-2-yl)-1,3-benzodioxole [PDF]

Acta Crystallographica Section E Structure Reports Online, 2008
In the title compound, C(16)H(12)O(2), the non-H atoms are coplanar with a mean r.m.s. deviation of 0.0260 (2) Å. The deviations of the bond angles from normal values at the indenyl junction C atom and the indenyl bridgehead C atom nearest the junction are imposed by the five-membered ring geometry.
Liang-Dong Sun, Xiao-Juan Deng, Wei-Yi Zhou, Rui-Xue Deng   +3 more
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6-Nitro-1,3-benzodioxole-4-carbaldehyde

Acta Crystallographica Section E Structure Reports Online, 2006
The title compound, C8H5NO5, consists of a cyclic diether (1,3-dioxalene) fused to 3-nitro­benzaldehyde. In the crystal structure, symmetry-related mol­ecules are linked by C—H⋯O hydrogen bonds, forming a sheet-like structure parallel to the ab plane. These sheets are further linked by C—H⋯O hydrogen bonds, forming a three-dimensional network.
Mukhtiar Hussain, Saqib Ali, Muhammad Altaf, Helen Stoeckli-Evans   +3 more
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