2) chiral oxazaborolidine
手性噁唑硼烷
1.
The asymmetric reduction of 3-chloropropiophenone catalyzed by chiral oxazaborolidines enantioselectively gave S- or R-3-chloro-1-phenylpropanol (2) in good yield.
以自制的手性噁唑硼烷为催化剂,将起始原料β-氯苯丙酮不对称催化氢化还原成(S)-或(R)-手性醇,这一步的化学收率和光学收率都较高。
2.
The asymmetric reduction of ethyl γ-chloroacetoacetate catalyzed by chiral oxazaborolidines enantioselectively gave ethyl R-3-hydroxy-4-chlorobutyrate in good yield and enantioselectivity.
以自制的手性噁唑硼烷为催化剂,将起始原料γ-氯乙酰乙酸乙酯不对称催化氢化还原成(R)-γ-氯-β-羟基丁酸乙酯,这一步的化学收率和光学收率都较高。
3.
The formed chiral oxazaborolidines in situ have been used in the enantioselective borane reduction of prochiral ketones affording the alcohol products with enantiomeric excesses (ee) up to 96%.
首次以天然D-樟脑的衍生物为原料,合成了两个新型龙脑基氨基醇配体,研究了它们与硼烷原位制备成手性噁唑硼烷后,在不对称催化氢化还原前手性芳酮中的性能,得到的手性仲醇的对映体过量(ee)值最高可达96%,还考察了反应温度、时间、溶剂等因素对苯乙酮的不对称氢化还原的化学产率和光学收率的影响。
3) oxazapholidine-borane
手性唑磷-硼烷
5) chiral oxazaborolidines
手性口恶唑硼烷
1.
The chiral oxazaborolidines formed in situ from the squaric acid aminoalcohols have been used as catalysts for the asymmetric reduction of prochiral aryl ketones to afford secondary alcohols in 85%～100% yield and with 35%～98% enantio.
新合成的 2～ 6五个配体用于原位制备手性口恶唑硼烷催化前手性芳酮及二酮的不对称还原反应 ,产物手性仲醇的化学得率和ee值分别为 85%～ 98%和 35%～ 98% ,新化合物的结构已被IR、1HNMR、MS和元素分析所证
6) chiral oxazoborolidines
手性鎓唑硼烷
补充资料：连续性与非连续性(见间断性与不间断性)
连续性与非连续性(见间断性与不间断性)
continuity and discontinuity
11an父ux泊g四f“山。麻以角g、.连续性与非连续性(c。nt，n琳t:nuity一)_见间断性与不间断性。and diseo红ti-
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条