## Abstract An improved synthesis of Bradykinin is described. N‐CBO‐G‐tosyl‐L‐arginyl‐L‐prolyl‐L‐prolyl‐glycine __p__‐nitrophenyl ester and L‐phenylalanyl‐L‐seryl‐L‐prolyl‐L‐phenylalanyl‐G‐tosyl‐L‐arginine are prepared and condensed together to N‐CBO‐G‐tosyl‐L‐arginyl‐L‐prolyl‐L‐prolyl‐glycyl‐L‐phe
Nouvelles synthèses de pyrimidines
✍ Scribed by E. Cherbuliez; K. N. Stavritch
- Publisher
- John Wiley and Sons
- Year
- 1922
- Tongue
- German
- Weight
- 853 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
En soumettant la mkthylkne-asparagine (I) a la reaction de Hofmann (traitement a l'hypobromite) dans le but de la transformer en un derive de l'acide diamino-propionique, nous avons obtenu un acide halogene C,H,03N,Br.
La constitution de ce corps pouvait 6tre interpretke de deux manihres. Les produits intermhdiaires, dans la reaction de Hofmann, ont une tendance trbs grande ti la cyclisation (p. ex. transformation de la phtal-diamide en benzoylhne-ur6e)l). Dans notre cas, on pouvait obtenir ainsi un derive de la p-diazine ( 11) Br 11 II + N-CH -I COOH VI. V. IV. I) Hoogewerff, can Dorp, R. 15, 111 (1896). l) R. Behrend, A. 229, 17 (1885): la 2,6-dioxy-4-m6thyl-pyrimidine transformbe 2, 0. 8ikzrk, A. 38 I, 152 (191 1): la 2-oxy-4,6-dim&hyl-pyrimidine transform& en 2,6-dioxy-4-m6thyl-5-bromo-pyrimidine. en 2-oxy-4,6-dim6thyl-5-bromo-pyrimidine. 0,2150 gr. de subst. ont donne 0,3179 gr. CO, et 0,1311 gr.
📜 SIMILAR VOLUMES
## Abstract A new synthesis of oxytocin is described. N‐CBO‐L‐glutaminyl‐L‐asparaginyl‐S‐benzyl‐L‐cysteinyl‐azide is reacted with L‐prolyl‐L‐leucyl‐glycinamide to give N‐CBO‐L‐ glutaminyl‐L‐asparaginyl‐S‐benzyl‐L‐cysteinyl‐L‐prolyl‐L‐leucyl‐glycinamide. After removal of the CBO group by HBr in acet
Barium hexaferrite, \(\mathrm{BaFe}_{12} \mathrm{O}_{19}\), was prepared by a new method which consists in reacting boron oxide. \(\mathrm{B}_{2} \mathrm{O}_{3}\), on barium monoferrite, \(\mathrm{BaFe}_{2} \mathrm{O}_{4}\). \(\mathrm{BaFe}_{2} \mathrm{O}_{4}\) was synthesized according to three pro
man nun vorsichtig mi t Essigsaurc an, SO krystallisiert das Oxim in go l b e n Nadeln. Nach dem Umkrystdlisieren aus siedendem Wasser h e l l g e l b e Saidelcheii, die sich obcrhalb 180° zersetzen, ohne vorher zu schmelzen. Sie wurden zur Analyse bci l l O o getroclcnet.
## Abstract The preparation of novel prostaglandin analogues from PGA~2~, isolated from marine corals, is outlined. The synthesis of prostaglandins that contain a cyclobutane instead of the cyclopentane ring is described. In addition, a detailed account of the total synthesis of prostaglandins by