一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List BOC-D-Phenylalanine
18942-49-9

BOC-D-Phenylalanine synthesis

6synthesis methods
-

Yield:18942-49-9 93%

Reaction Conditions:

with guanidine hydrochloride in ethanol at 35 - 40; for 6.5 h;

Steps:

2.4. General procedure for N-tert-butoxycarbonylation of aminoacids and peptides (Table 2, entries 1-12):
General procedure: Amino acid or peptide (1 mmol) was added with stirring to a solution of guanidine hydrochloride (15 mol%) and di-tert-butyl dicarbonate (2.5-3 mmol) in EtOH (1 mL), at 35-40°C. The reaction mixture was continued to stir until a clear solution was obtained. EtOH was evaporated under vacuum and the residue was successively washed with water (2 mL) and hexane or petroleum ether (2 mL) to afford almost pure N-Boc amino acids or N-Boc peptides. If necessary, the crude products could be recrystallized for further purification.

References:

Jahani, Fatemeh;Tajbakhsh, Mahmood;Golchoubian, Hamid;Khaksar, Samad [Tetrahedron Letters,2011,vol. 52,# 12,p. 1260 - 1264] Location in patent:supporting information; experimental part

FullText

BOC-D-Phenylalanine Related Search:

密山市| 蓬安县| 延边| 尼玛县| 延川县| 余庆县| 神农架林区| 天峨县| 灌南县| 克拉玛依市| 瓦房店市| 体育| 自贡市| 永新县| 乐业县| 措勤县| 宁晋县| 贵溪市| 屯昌县| 哈密市| 金山区| 郑州市| 内黄县| 红安县| 沙洋县| 永安市| 新密市| 凤凰县| 临沂市| 潍坊市| 泰和县| 遂昌县| 丰镇市| 邳州市| 温宿县| 山丹县| 福安市| 大城县| 广汉市| 湖北省| 贡觉县|