Preparation of 4, 4'-Isopropylidenediphenol

I-4: Sperm Preparation: Biomimetic Aspects

With the advent of human assisted reproduction in the year 1978 numerous techniques were developed to isolate spermatozoa capable to fertilize oocytes. While early methodologies only focused on the aim of isolating viable, motile spermatozoa, with further progress of assisted reproductive technology, particularly for ICSI, it rapidly became clear that these two parameters are insufficient for t...

Microwave Irradiation Promoted Reactions of Benzoxazin-4-Ones with Primary Amines. Preparation of 4(2=3H)-Quinazolinones

An efficient synthesis of 3-substituted or 2,3-disubstituted 4(3H)-quinazolinones from benzoxazin-4-ones and primary amines under microwave irradiation in unsealed vessels is described.

Preparation and Properties of Cucumber Virus 4

A substantial relationship between cucumber viruses 3 and 4 and certain members of the tobacco mosaic virus group may be demonstrated by a comparison of their physicochemical properties and by serological tests (l-3). However, the test which would establish conclusively kinship between these nucleoproteins, namely the immunization of a plant diseased with cucumber virus 3 or 4 against infection...

Simple Preparation of N-Substituted 4-Arylpyrrolones.

eernpounds,2) This prompted us to devise a general synthetic method for N-substituted 4-arylpyrrolones. rv-Unsubstituted 4-(4-chlorophenyl)pyrrolone has been prepared from 4-bromo-3-(4-chlorophenyl)-2-butenoic acid with a largc excess ammonia water,i) However, the application of this method, using excess arnines in an aqueous so[ution, would be Iimited, rv-Substitutcd arylpyrrelones may be prep...

The Aldol Condensation Preparation of 4-Methoxybenzalacetone