CAS No:35661-60-0
Formula:C21H23NO4
Synonyms:FMOC-LEU-OH;FMOC-L-LEU-OH;FMOC-L-LEU;FMOC-L-LEUCINE;F-L-LEU;Fmoc-L-leucine,98%;L-Leucine-1-13C-N-FMOC;N-(fluorenyl-9-methoxycarbonyl)leucine
China Export:From 2018.11 to 2019.11, total export volume of FMOC-L-Leucine from China was 76,865,630KG while total export value was $825,816,556. The biggest proportion of exporting volume in the last 12 months was 14.24% in 2019.05.
Chemical Products FMOC-L-Leucine Description
white to light yellow crystal powde
Chemical Products FMOC-L-Leucine Basic Attributes
CAS No:35661-60-0
Molecular Formula :C21H23NO4
Molecular Mass :353.41
Exact Mass :353.162720
PSA :75.6 A^2
LogP :4.4
EINECS :252-662-7
InChIKeys :CBPJQFCAFFNICX-IBGZPJMESA-N
H-bond Acceptor :4
H-bond Donor :2
SP3 :0.33
RBN :7
Chemical Products FMOC-L-Leucine Characteristics
Density :1.2±0.1 g/cm3
Melting Point :152-156 °C(lit.)
Bolling Point :559.8°C at 760 mmHg
Flash Point :292.4±25.4 °C
Refractive Index :1.583
Storage Condition :2-8°C
BRN :2178254
Specific Rotation :-26 º (c=1,DMF 24 ºC)
Chemical Products FMOC-L-Leucine Safety Information
HS Code :2924299090
UN No. :NONH for all modes of transport
WGK_Germany :3
Risk Code :36/37/38
Safety Instructions :22-24/25-36/37/39-27-26
Dangerous Mark :Xi
P Code :P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P312, P322, P330, P363, P501
Hazard Statements :H302
Chemical Products FMOC-L-Leucine Production Methods
General procedure: To a solution of H-Phe-OH (100 mg, 60.5 mmol) in 50 percent MeCN (6.1 mL)were added Fmoc-OPhth (233 mg, 60.5 mmol) and K2CO3 (167 mg, 121 mmol) and stirred at room temperature. After 2 h of stirring saturated sodium bicarbonate solution and H2O were added and the resulting solution was washed with diethyl ether. The aqueous phase is acidified to pH 1 with 1M HCl and extracted with diethyl ether. The organic phase was washed with 1 M HCl, H2O, brine, dried over MgSO4. The filtrate was evaporatedevaporated under reduced pressure to give yellow solid as crude product.EXAMPLE 22
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