Studies on Pyrimidine Derivatives and Related Compounds. LXIII. Reactions of Thiazolium Salts with Dialkyl Acylphosphonates : Takamizawa Reaction 8

the evaluation of language related engagment and task related engagment with the purpose of investigating the effect of metatalk and task typology

abstract while task-based instruction is considered as the most effective way to learn a language in the related literature, it is oversimplified on various grounds. different variables may affect how students are engaged with not only the language but also with the task itself. the present study was conducted to investigate language and task related engagement on the basis of the task typolog...

Lxiii. Studies on the Permeability

IN earlier papers of this series [Davson, 1934; Davson and Danielli, 1936] attention has been drawn to the work of Ponder and Saslow [1930; 1931] on the volumes of rabbit's erythrocytes. These authors observed that in hypotonic solutions the erythrocytes gained much less water than was expected and in hypertonic solutions lost far less; in fact an increase in volume ofthe erythrocytes was gener...

Chemistry of Iminium Salts and Related Compounds

Chemistry of Iminium Salts and Related Compounds

Reaction of 1-alkylthioisoquinolinium salts with active methylene compounds.

2-Alkyl-1-alkylthioisoquinolinium salts were readily prepared from 2-alkyl-1(2H)-isoquinolones via 2-alkyl1(2H)-thioisoquinolones in two steps. Under mild conditions, the reaction of 2-alkyl-1-alkylthioisoquinolinium salts with active methylene compounds in the presence of sodium hydride afforded 2-alkyl-1-(substituted methylene)iso-quinolines in good yields. Pyrrolo[2,1-a]isoquinolines were sy...