| 3 | 1/1 | 返回列表 |
| 查看: 2728 | 回復(fù): 2 | ||
aileenshan銀蟲 (小有名氣)
|
[求助]
求助一個(gè)化合物的旋光度或者旋光度的正負(fù)號(hào) 已有2人參與
|
|
ACS號(hào)為 537-46-2 名稱: Benzeneethanamine 最好有旋光度的數(shù)值,找不到可以是方向,外加溶解的溶劑 |
至尊木蟲 (著名寫手)
新藥研發(fā)

鐵桿木蟲 (著名寫手)
roye
The configuration of title compds. was detd. by the method of asym. transformation. Following MeCH(NHR)(CH2)nPh (I) (R = H) were prepd. by the method of Wallach and Leuckart (n and b.p./mm. given): 0, 78-80°/13; 1, 103°/13; 2, 110-15°/14; and 3, 123-5°/19. The following I (R = CHO) were prepd. by formylation of I (R = H) (n and b.p./mm. given): 0, 125-30°/0.3; 1, 155-7°/3; 2, 145-50°/3; and 4, - (m. 65-6°). The redn. of I (R = CHO) with LiAlH4 gave the following I (R = Me) (n and b.p./mm. given): 0, 80°/12; 1, 48-52°/15; 2, 80°/1; 3, 122-4°/10; and 4, 135-7°/18. I (R = Me, n = 0-4) (7.5 millimoles) in 5 ml. tetrahydrofuran were treated with 5 millimoles (S)(+)-hydratropic acid ([α]D 86.6°) and 5 millimoles dicyclohexylcarbodiimide. The following unreacted optically active I were removed by distn.: (S)(- -I (R = Me, n = 0), [α]D -3.5°; (S)(+)-I (R = Me, n = 1), [α]D 0.12°; (S)(- -I (R = Me, n = 2), [α]D -0.36°; (S)(- -I (R = Me, n = 3), [α]D -0.2°; and (S)(- -I (R = Me, n = 4), [α]D -0.16°. (R)(+)-I (R = H, n = 2), [α]D 3.12°, was converted into (R)(- -I (R = Ac, n = 2), m. 55°, [α]D -7.12° (c 0.9, EtOH), which upon ozonolysis, H2O2 oxidn., sapon. and benzoylation, gave (R)(+)-N-benzoyl-γ-aminovaleric acid, [α]D 3.33° (c 0.6, H2O), whose abs. configuration was detd. by Balenovic and Cerar. (+)-I (R = H) and (+)-I (R = Me) belong to the same steric series as shown by O.R.D. studies. The O.R.D. curve of S-(- -I (R = H, n = 0) showed a pos. Cotton effect at 250-70 mμ superimposed on a strong neg. background curve. (S)(+)-I (R = H, n = 1) showed the same pos. Cotton effect on an anomalous pos. background. The O.R.D. curves of (S)(- -I (R = H, n = 2-4) were monotone. CA查到的結(jié)果是+0.12 ° Wavlen: 589.3 nm。 |

| 3 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿吉大化學(xué)322求調(diào)劑 +3 | 17501029541 2026-03-23 | 4/200 |
|
|---|---|---|---|---|
|
[考研] 085600材料與化工調(diào)劑 +7 | A-哆啦Z夢(mèng) 2026-03-23 | 12/600 |
|
|
[考研] 327求調(diào)劑 +5 | prayer13 2026-03-23 | 5/250 |
|
|
[考研] 材料專碩英一數(shù)二306 +8 | z1z2z3879 2026-03-18 | 8/400 |
|
|
[考研]
|
孅華 2026-03-22 | 4/200 |
|
|
[考研] 08工學(xué)調(diào)劑 +7 | 用戶573181 2026-03-20 | 11/550 |
|
|
[考研] 招08考數(shù)學(xué) +6 | laoshidan 2026-03-20 | 14/700 |
|
|
[考研] 298求調(diào)劑 +8 | 上岸6666@ 2026-03-20 | 8/400 |
|
|
[考研] 276求調(diào)劑 +3 | YNRYG 2026-03-21 | 4/200 |
|
|
[考研] 293求調(diào)劑 +3 | 濤濤Wjt 2026-03-22 | 5/250 |
|
|
[考研] 考研調(diào)劑 +4 | 來好運(yùn)來來來 2026-03-21 | 4/200 |
|
|
[考研] 材料與化工(0856)304求B區(qū)調(diào)劑 +3 | 邱gl 2026-03-20 | 7/350 |
|
|
[考研] 求調(diào)劑 +3 | .m.. 2026-03-21 | 4/200 |
|
|
[考研] 0805材料320求調(diào)劑 +3 | 深海物語(yǔ) 2026-03-20 | 3/150 |
|
|
[考研] 332求調(diào)劑 +3 | 鳳凰院丁真 2026-03-20 | 3/150 |
|
|
[考研] 303求調(diào)劑 +5 | 睿08 2026-03-17 | 7/350 |
|
|
[考研] 304求調(diào)劑 +7 | 司空. 2026-03-18 | 7/350 |
|
|
[考研] 353求調(diào)劑 +3 | 拉鉤不許變 2026-03-20 | 3/150 |
|
|
[考研] 0703化學(xué)調(diào)劑 +4 | 18889395102 2026-03-18 | 4/200 |
|
|
[考研] 085600材料與化工調(diào)劑 324分 +10 | llllkkkhh 2026-03-18 | 12/600 |
|