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        有机合成中大量的反应涉及到对某个基团的保护或者对某个被保护的基团经行去保护的工作。不能做好官能团的保护和去保护,可以肯定完成不了或完成不好有机合成工作。不少保护和去保护工作是为实现合成目标必须经行的,但也有许多保护和去保护工作的经行是一种无奈,反映出了我们对化学反应的把握是随心所欲还是差的很远。

 

        这是一种挑战,推动我们朝着最终能完全了解,并控制各种分子中原子间的成断键过程前进。

 

        尤其在天然产物的合成当中,保护和去保护工作十分重要,甚至可以说非常关键。多种保护基产品的出现,给研究人员达到合成目标,提供了一种非常重要的有机合成手段。

 

B802170  叔丁基二甲基氯硅烷(TBDMS-Cl), 97%

 

B802804  叔丁基二苯基氯硅烷(TBDPS-Cl), 98%

 

Reactions of alcohols with silyl chlorides in the presence of N-methylimidazole were significantly accelerated by addition of iodine. A general and high yielding method for efficient silylation of primary, secondary, and tertiary alcohols was developed.
A. Bartoszewicz, M. Kalek, J. Nilsson, R. Hiresova, J. Stawinski, Synlett2008, 37-40.

产品编号 CAS号 项目名称规格 分子式 加入购物车
A800668 106-95-6 溴丙烯, 包含≤1000 ppm 氧化丙烯稳定剂, 98%
Allyl bromide, 包含≤1000 ppm 氧化丙烯稳定剂, 98%
C3H5Br
A800701 123-11-5 对茴香醛, 99%
p-Anisaldehyde, 99%
C8H8O2
A800703 123-11-5 对茴香醛, Standard for GC,≥99%(GC)
p-Anisaldehyde, Standard for GC,≥99%(GC)
C8H8O2
A801410 123-11-5 对茴香醛, ≥98%,FCC
p-Anisaldehyde, ≥98%,FCC
C8H8O2
B802151 70-11-1 2-溴苯乙酮, 98%
2-Bromoacetophenone, 98%
C8H7BrO
B802170 18162-48-6 叔丁基二甲基氯硅烷, 97%
tert-Butyldimethylsilyl chloride, 97%
C6H15ClSi
B802171 18162-48-6 叔丁基二甲基氯硅烷, 50%甲苯溶液
tert-Butyldimethylsilyl chloride solution, 50%甲苯溶液
C6H15ClSi
B802233 98-88-4 苯甲酰氯, AR,99.0%
Benzoyl chloride, AR,99.0%
C7H5ClO
B802330 501-53-1 氯甲酸苄酯, 96%
Benzyl chloroformate, 96%
C8H7ClO2
B802569 100-39-0 溴化苄, >98.0%(GC),含100ppm环氧丙烷稳定剂
Benzyl bromide, >98.0%(GC),含100ppm环氧丙烷稳定剂
C7H7Br
B802746 100-44-7 氯化苄, >99.0%(GC)
Benzyl chloride, >99.0%(GC)
C7H7Cl
B802747 100-44-7 氯化苄, AR
Benzyl chloride, AR
C7H7Cl
B802748 100-44-7 氯化苄, Standard for GC
Benzyl chloride, Standard for GC
C7H7Cl
B803685 58632-95-4 2-(叔丁氧羰基氧亚氨基)-2-苯乙腈, 99%
2-(Boc-oxyimino)-2-phenylacetonitrile, 99%
C13H14N2O3
C804597 75-77-4 三甲基氯硅烷, >98.0%(GC)
Chlorotrimethylsilane (TMCS), >98.0%(GC)
C3H9ClSi
C804598 75-77-4 三甲基氯硅烷, ≥99.0%(GC)
Chlorotrimethylsilane (TMCS), ≥99.0%(GC)
C3H9ClSi
C804873 994-30-9 三乙基氯硅烷, 98%
Chlorotriethylsilane, 98%
C6H15ClSi
C821680 75-77-4 三甲基氯硅烷, 99.0%, MkSeal
Chlorotrimethylsilane (TMCS), 99.0%, MkSeal
C3H9ClSi
D806924 24424-99-5 二碳酸二叔丁酯, 98%
Di-tert-butyl dicarbonate, 98%
C10H18O5
D806925 24424-99-5 二碳酸二叔丁酯, 99%
Di-tert-butyl dicarbonate, 99%
C10H18O5
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