79913-07-8Relevant academic research and scientific papers
Thallium(III) chloride: A mild and efficient catalyst for acylation of alcohols, phenols and thiols, and for geminal diacylation of aldehydes under solvent-free conditions
Kadam, Santosh T.,Kim, Sung Soo
experimental part, p. 3307 - 3313 (2009/05/07)
Thallium(III) chloride is a simple and efficient catalyst for acylation of alcohols, phenols and thiols. It is also very effective for geminal diacylation of aldehydes. The acylation reaction using acetic anhydride proceeds in excellent yield in the presence of catalytic amounts of thallium(III) chloride (1 mol%) at room temperature within relatively short reaction times (20 min). Structurally diverse alcohols, phenols, thiols and aldehydes undergo acylation under solvent-free conditions.
A facile and efficient conversion of aldehydes into 1,1-diacetates (acylals) using iron(III) fluoride as a novel catalyst
Kamble,Tayade,Davane,Kadam
, p. 590 - 594 (2008/03/11)
Aldehydes are smoothly converted into the corresponding 1,1-diacetates (acylals) in high yields in the presence of a catalytic amount (0.1 mol-%) of iron(III) fluoride at room temperature. The noteworthy features of the present system are shorter reaction times, chemoselective protection of aldehydes, and solvent-free conditions. The procedure is especially useful for large-scale syntheses as the catalyst is highly effective from the view of activity, selectivity, reusability, and economy in the preparation of 1,1-diacetates (acylals). CSIRO 2007.
An efficient method for the synthesis of acylals from aldehydes using silica-supported perchloric acid (HClO4-SiO2)
Kamble, Vinod T.,Jamode, Vasant S.,Joshi, Neeta S.,Biradar, Ankush V.,Deshmukh, Rameshchandra Y.
, p. 5573 - 5576 (2007/10/03)
The synthesis of acylals from structurally diverse aldehydes has been performed in excellent yields under solvent-free conditions using HClO4-SiO2 as a mild, convenient, reusable, and heterogeneous catalyst. The procedure is operationally simple, environmentally benign and has the advantage of enhanced atom utilization. Furthermore, the catalyst can be recovered simply and reused efficiently a number of times without appreciable loss of activity.
Solvent-free catalytic preparation of 1,1-diacetates from aldehydes using a Wells-Dawson acid (H6P2W18O62·24H 2O)
Romanelli, Gustavo P.,Thomas, Horacio J.,Baronetti, Graciela T.,Autino, Juan C.
, p. 1301 - 1303 (2007/10/03)
Aromatic and aliphatic aldehydes are transformed in 1,1-diacetates (acylals) in mild conditions, by a treatment with acetic anhydride and a Wells-Dawson acid (H6P2W18O62·24H 2O). gem-Diacetylation proceeds in Ac2O with a little as 1% mol Wells-Dawson acid at room temperature and under solventless conditions, obtaining very good to excellent yields (88-98%) of 1,1-diacetates (19 examples). Neither 4-dimethylaminobenzaldehyde nor ketones react under the same conditions.
LiBF4-mediated conversion of aldehydes to gem-diacetates
Yadav, Jhillu S.,Reddy, Basi V. S.,Venugopal, Chenna,Ramalingam
, p. 604 - 606 (2007/10/03)
An efficient and highly selective method for the conversion of aldehydes to gem-diacetates is described using lithium tetrafluoroborate under mild reaction conditions. Due to the neutral reaction conditions, this method is compatible with acid-sensitive p
