Substituted tetra-2,3-pyrazinoporphyrazines. Part I. Angular annelation of tetra-2,3-quinoxalinoporphyrazine
نویسندگان
چکیده
منابع مشابه
Synthesis of tetra-substituted phenanthroimidazole derivatives using SBA-Pr-SO3H
A one pot four-component reaction of 9,10-phenanthraquinone, aromatic aldehyde, aniline, and ammonium acetate was designed for the preparation of tetrasubstituted imidazoles (phenanthro[9,10-d]imidazole) derivatives in the presence of SBA-Pr-SO3H as a mesoporous solid acid catalyst. Phenanthro[9,10-d]imidazole derivatives were produced by the use of this technique in short reaction times and go...
متن کاملI-23: Hysteroscopic Complications
Hysteroscopic complications are infrequent. Major complications include: 1. Uterine perforation that is the most common complication of operative hysteroscopy (0.8 - 1.6 %). The perforation rate is less during diagnostic hysteroscopy. 2. Bowel or bladder injury which is rare, but may occur in association with uterine perforation or as a result of use of electrical current. 3. Cervical laceratio...
متن کاملTetra-μ3-tert-butanolato-tetrathallium(I)
The title compound, [Tl(4)(C(4)H(9)O)(4)], featuring a (Tl-O)(4) cube, crystallizes with a quarter-mol-ecule (located on a special position of site symmetry ..) and a half-mol-ecule (located on a special position of site symmetry 23.) in the asymmetric unit. The Tl-O bond distances range from 2.463 (12) to 2.506 (12) Å. All O-Tl-O bond angles are smaller than 90° whereas the Tl-O-Tl angles are ...
متن کاملI-23: Mild Stimulation in ART
Background The conventional ovarian stimulation protocol aims to provide the maximum number of oocytes for fertilization which is lead to several embryos for selecting to transfer. There are some complications in this case like; OHSS, Multiple gestation, Time consuming, Patients discomfort, High costs, Emotional distress and Reduced implantation rate due to the embryo- endometrial asynchrony. R...
متن کاملCharge separation in ground-state 1,2,4,5-tetra-substituted benzene derivatives.
The conditions required for a formal biradical to exist in a zwitterionic form in the ground state are discussed following the recent experimental observation of zwitterionic structure in the ground state of a quinoid molecule (di-tert-butyl derivative of 2,5-diamino-1,4-benzoquinonediimine, I). A unique characteristic of molecules of this class is the fact that they may be considered as being ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1996
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v96-055