In organic synthesis effective use of protecting groups is very important to a synthetic strategy. A useful protecting group must have the following properties:
　 - the protective agent must selectively react with the functional group that requires protection.
　- the protective group must be introduced in high yields, without side reactions.
　- the protected functional groups should be stable against a variety of reactions.
　- the protective group should be capable of being selectively deprotected under specific conditions that are not adverse to the integrity of the protected compound.
A list encompasses a wide range of protective agents, from those that provide conventional protecting groups (TMS, Boc, trityl amongst others) to a new special protective agent, 1,2-bis(chlorodimethylsilyl)ethane which reacts only with aliphatic primary amines to generate azadisilacyclopentane derivatives.

M0681	P1378	B1128
B1688	B1699	B1773
B1151	D1608	D2334
T1410	B1043	T0670
M1199	B1969	C0795
D1463	C1339	B0988
T2544	B1089	D2504
M0071	M0680	N0516
N0363	D0555	T1535
M1004	T1526	T1071
D1612	D2915	M0441
M1006	M0802	M0790
N0507	N0181	C1400
T1573	B1702	F0197
B1483	B2817	B3021
C0176	B2334	C1591
C1574	C1573	T0589
C0306	D1547	D2469
P1277	D2461	C1600
P1281	D2262	D0695
D2159	C1415	E0471
E0478	E0479	I0303
M0979	B1906	T1277
C0683	M1077	B0916
T1485	T0272	D1044
B1315	T0872	B1436
B1496	B0995	B2697
T1525	B1223	B1663
T1468	T1689	T1078
T1588	D2390	T0871
T1237	T0512	C0308

M0681	(2-Methoxyethoxymethyl)triethylammonium Chloride
P1378	(Phenylthio)trimethylsilane
B1128	1,2-Benzenedisulfonyl Dichloride
B1688	1,2-Bis(chlorodimethylsilyl)ethane [Protecting Reagent for Primary Amines]
B1699	1,2-Bis(dimethylsilyl)benzene
B1773	1,2-Bis[(dimethylamino)dimethylsilyl]ethane [Protecting Reagent for Aromatic Primary Amines]
B1151	1,3-Benzodithiolylium Tetrafluoroborate [Hydroxyl-Protecting Agent]
D1608	1,3-Dichloro-1,1,3,3-tetraisopropyldisiloxane [Hydroxyl Protecting Agent]
D2334	1,3-Dichloro-1,1,3,3-tetramethyldisiloxane
T1410	1-(2,4,6-Triisopropylbenzenesulfonyl)imidazole
B1043	1-(tert-Butyldimethylsilyl)imidazole [tert-Butyldimethylsilylating Agent]
T0670	1-(Trifluoroacetyl)imidazole
M1199	1-Methoxy-1-trimethylsilyloxypropene
B1969	1-tert-Butoxycarbonyl-1,2,4-triazole
C0795	2,2,2-Trichloroethyl Chloroformate
D1463	2,4-Dinitrophenylsulfenyl Chloride
C1339	2-(Chloromethoxy)ethyltrimethylsilane (stabilized with Diisopropylethylamine)
B0988	2-(tert-Butoxycarbonyloxyimino)-2-phenylacetonitrile
T2544	2-(Trimethylsilyl)ethyl 3-Nitro-1H-1,2,4-triazole-1-carboxylate
B1089	2-Boc-thio-4,6-dimethylpyrimidine [Boc Agent for Peptides Synthesis]
D2504	2-Chlorophenyldiphenylmethyl Chloride
M0071	2-Mesitylenesulfonyl Chloride
M0680	2-Methoxyethoxymethyl Chloride
N0516	2-Nitro-5-thiocyanatobenzoic Acid
N0363	2-Nitrophenylsulfenyl Chloride [N-Protecting Agent for Peptides Research]
D0555	3,4-Dihydro-2H-pyran
T1535	3-Trimethylsilyl-2-oxazolidinone [Trimethylsilylating Reagent]
M1004	4'-Methoxyphenacyl Bromide
T1526	4,4',4''-Tris(4,5-dichlorophthalimido)trityl Bromide [Protecting Reagent for Primary Alcohol]
T1071	4,4',4''-Tris(benzoyloxy)trityl Bromide [Hydroxyl Protecting Agent]
D1612	4,4'-Dimethoxytrityl Chloride [Hydroxyl Protecting Agent]
D2915	4-(Dimethylamino)-1-(triphenylmethyl)pyridinium Chloride (contains 5% Dichloromethane at maximum)
M0441	4-(Methylthio)phenol
M1006	4-Methoxy-2-nitrobenzenesulfonyl Chloride
M0802	4-Methoxybenzenesulfonyl Chloride
M0790	4-Methoxytrityl Chloride [Hydroxyl Protecting Agent]
N0507	4-Nitrobenzenesulfonyl Fluoride
N0181	4-Nitrobenzyl Bromide
C1400	4-Nitrophenyl Chloroformate
T1573	4-Trimethylsilyloxy-3-penten-2-one
B1702	9-Bromo-9-phenylfluorene
F0197	9-Fluorenylmethyl Chloroformate [N-Protecting Agent for Peptides Research]
B1483	Benzyl 2,2,2-Trichloroacetimidate
B2817	Benzyl 2-Bromoethyl Ether
B3021	Benzyl Chloroformate
C0176	Benzyl Chloroformate (30-35% in Toluene)
B2334	Benzylchlorodimethylsilane
C1591	Carbonic Acid Benzyl 4-Nitrophenyl Ester
C1574	Carbonic Acid tert-Butyl 2,4,5-Trichlorophenyl Ester
C1573	Carbonic Acid tert-Butyl Phthalimido Ester
T0589	Chlorotriethylsilane
C0306	Chlorotrimethylsilane
D1547	Di-tert-butyl Pyrocarbonate [Boc-reagent for Amino Acid]
D2469	Di-tert-butyldichlorosilane
P1277	Diallyl Pyrocarbonate
D2461	Dibenzosuberyl Chloride
C1600	Dibenzyl Carbonate
P1281	Dibenzyl Pyrocarbonate
D2262	Diethylisopropylsilyl Chloride
D0695	Dimethylcarbamoyl Chloride
D2159	Dimethylthiophosphinic Chloride
C1415	Diphenylphosphinic Chloride
E0471	Ethylene Di(thiotosylate) [Protecting Reagent for Active Methylene]
E0478	Ethylenedioxybis(trimethylsilane) [Protecting Reagent for Aldehydes and Ketones]
E0479	Ethylenedithiobis(trimethylsilane) [Protecting Reagent for Aldehydes and Ketones]
I0303	Isopropenyl Methyl Ether
M0979	Methoxycarbonylsulfenyl Chloride
B1906	N,O-Bis(tert-butyldimethylsilyl)acetamide [tert-Butyldimethylsilylating Agent]
T1277	N-(Trimethylsilyl)morpholine
C0683	N-Ethoxycarbonylphthalimide [for Peptide synthesis]
M1077	N-Methyl-N,O-bis(trimethylsilyl)hydroxylamine
B0916	N-tert-Butoxycarbonylimidazole
T1485	p-Toluenesulfonic Anhydride
T0272	p-Toluenesulfonyl Chloride
D1044	Pentachlorophenyl Dichloroacetate [for Peptide synthesis]
B1315	Phenacyl 4-(Bromomethyl)phenylacetate
T0872	S-Ethyl Trifluorothioacetate [Trifluoroacetylating Agent for Peptides Research]
B1436	tert-Butoxydiphenylchlorosilane (stabilized with CaCO3)
B1496	tert-Butyl 2,2,2-Trichloroacetimidate
B0995	tert-Butyldimethylchlorosilane [tert-Butyldimethylsilylating Agent]
B2697	tert-Butyldimethylsilyl N-Phenylbenzimidate
T1525	tert-Butyldimethylsilyl Trifluoromethanesulfonate
B1223	tert-Butyldiphenylchlorosilane
B1663	tert-Butylmethoxyphenylsilyl Bromide
T1468	Trifluoromethanesulfonic Acid Diethylisopropylsilyl Ester
T1689	Trifluoromethanesulfonic Acid Triethylsilyl Ester
T1078	Triisopropylsilyl Chloride
T1588	Triisopropylsilyl Trifluoromethanesulfonate
D2390	Trimethylene Di(thiotosylate) [Protecting Reagent for Active Methylene]
T0871	Trimethylsilyl Trifluoromethanesulfonate [Trimethylsilylating Agent]
T1237	Triphenylmethanesulfenyl Chloride
T0512	Triphenylmethyl Bromide
C0308	Triphenylmethyl Chloride