Criss-cross cycloadditions on ketazines derived from alicyclic ketones.

نویسندگان

  • Jirí Verner
  • Milan Potácek
چکیده

The reactivity of alicyclic ketazines in criss-cross cycloadditions was investigated. They react with potassium cyanate and ammonium thiocyanate in the presence of acetic acid to form spirocyclic perhydro[1,2,4]triazolo[1,2-alpha][1,2,4]triazole-1,5-diones and perhydro[1,2,4]triazolo[1,2-alpha][1,2,4]triazole-1,5-dithiones, respectively, in relatively high yields.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Investigation on the effect of trifluoromethyl group on the [3+2] cycloadditions of thiocarbonyl S-methanides with α, β-unsaturated ketones: A theoretical study using DFT

A [3+2] cycloaddition (32CA) reaction among a thiocarbonyl ylide (TCY 2) with (E)-4,4,4-trifluoro-4-phenylbut-3-en-2-one (TFB 4) as an electron-deficient enone in tetrahydrofuran (THF) were studied within the Molecular Electron Density Theory (MEDT), at the DFT-B3LYP/6-31G(d) computational level to analysis energetics, selectivities, and mechanistic aspects. The reaction can progress in four co...

متن کامل

Biotransformation of isoprenoids and shikimic acid derivatives by a vegetable enzymatic system.

In biotransformations carried out under similar conditions enzymatic systems from carrot (Daucus carota L.), celeriac (Apium graveolens L. var. rapaceum) and horse-radish (Armoracia lapathifolia Gilib.) hydrolyzed the ester bonds of acetates of phenols or alicyclic alcohols. Nevertheless, methyl esters of aromatic acids did not undergo hydrolysis. Alcohols were oxidized to ketones in a reversib...

متن کامل

Cardiac CT of a Criss-Cross Heart: A Case Report

A criss-cross heart is an extremely rare congenital anomaly that is commonly associated with complex cardiac defects. The literature on imaging of such a condition is limited. In particular, cardiac CT imaging of criss-cross heart is sparse. We present a case of a full-term infant with criss-cross heart, in which cardiac CT delineated the complex heart anatomy and confirmed known echocardiograp...

متن کامل

Successful catheter ablation using real-time ultrasound-assisted 3-D electroanatomical mapping system for atrioventricular accessory pathway in a 1-year-old girl with criss-cross heart

Criss-cross heart, defined as crossing of the long axis of the atrioventricular (AV) valves, is an extremely rare congenital heart defect. The unusual arrangement of the cardiac inlets observed in criss-cross heart was first described by Lev and Rowlatt in 1961. The term “criss-cross heart” was initially coined by Anderson et al in 1972. The reported incidence of criss-cross heart is no greater...

متن کامل

On the Finiteness of the Criss-Cross Method

In this short paper, we prove the niteness of the criss-cross method by showing a certain binary number of bounded digits associated with each iteration increases monotonically. This new proof immediately suggests the possibility of relaxing the pivoting selection in the criss-cross method without sacri cing the niteness.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Molecules

دوره 11 1  شماره 

صفحات  -

تاریخ انتشار 2006