57770-11-3Relevant academic research and scientific papers
Catalytic activity of halohydrin dehalogenases towards spiroepoxides
Majeric Elenkov, Maja,Primozic, Ines,Hrenar, Tomica,Smolko, Ana,Dokli, Irena,Salopek-Sondi, Branka,Tang, Lixia
, p. 5063 - 5072 (2012)
A novel activity of halohydrin dehalogenases towards spiroepoxides has been found. The enzyme from Arthrobacter sp. (HheA) catalysed highly regioselective azidolysis of spiroepoxides containing 5, 6 and 7-membered cycloalkane rings, while the enzyme from Agrobacterium radiobacter (HheC), besides high regioselectivity, also displayed moderate to high enantioselectivity (E up to >200) that can be applied for the kinetic resolution of chiral spiroepoxides. The orientations of spiroepoxides in the active site of halohydrin dehalogenases were studied by quantum-chemical calculations and docking simulations. Analyses of the complexes obtained revealed the origins of diastereoselectivity and enantioselectivity of the investigated biotransformations.
A waste-minimized protocol for the preparation of 1,2-azido alcohols and 1,2-amino alcohols
Ballerini, Eleonora,Crotti, Paolo,Frau, Ileana,Lanari, Daniela,Pizzo, Ferdinando,Vaccaro, Luigi
supporting information, p. 2394 - 2400 (2013/09/12)
Under solvent-free conditions the reaction of epoxides 1a-i with trimethylsilylazide (2) catalyzed by polystiryl-supported fluoride (PS-DABCOF2) has led to the efficient preparation of the corresponding O-TMS protected 1,2-azido alcohols 3a-i that, by treatment with Dowex-H, gave the related 1,2-azido alcohols 4a-i in excellent yields (83-99% and 82-96%, respectively). The use of a flow procedure has allowed us to significantly minimize waste in the preparation of representative 1,2-azido alcohols 4a, 4c and 4i that have been obtained with E-factors of 1.6, 2.1, and 1.9, respectively. The 1,2-amino alcohols 5a, 5c and 5f have been also prepared, in quantitative yields, by reduction of the corresponding O-TMS protected 1,2-azido alcohols 3a, 3c, and 3f by Pd on the Al2O3/HCOOH system.
An Efficient Nucleophilic Cleavage of Oxiranes to 1,2-Azido Alcohols
Sarangi, Chintamani,Das, Nalin B.,Nanda, Bhagabat,Nayak, Amalendu,Sharma, Ram P.
, p. 378 - 379 (2007/10/03)
Regioselective ring opening of oxiranes has been induced by the SnCl2·2H2O-Mg-THF/NaN3-H2O system to give the corresponding 1,2-azido alcohols in good yields.
Efficient metal salt catalyzed azidolysis of epoxides with sodium azide in acetonitrile
Chini,Crotti,Macchia
, p. 5641 - 5644 (2007/10/02)
A new, simple, efficient, completely anti stereoselective method for the azidolysis of 1,2 epoxides with NaN3 in acetonitrile, by means of metal salts, is described. The use of a non-protic solvent makes this method very competitive with the ot
HIGHLY NUCLEOPHILIC TRIBUTYLTIN AZIDE IN OXIRANE RING CLEAVAGE LEADING TO 1,2-AZIDO ALCOHOL
Saito, Seiki,Yamashita, Shuhei,Nishikawa, Toshiya,Yokoyama, Yoshie,Inaba, Masami,Moriwake, Toshio
, p. 4153 - 4156 (2007/10/02)
Enhanced reactivity of tributyltin azide has been demonstrated in nucleophilic ring cleavage of oxiranes without solvent and promoter to give 1,2-azido alcohols in good to excellent yields.
