7351-45-3

Upstream product

• 109-72-8 n-butyllithium 
• 7385-10-6 9-(trimethylsilyl)fluorene 
• 75-77-4 chloro-trimethyl-silane 
• 86-73-7 9H-fluorene 
• 3531-83-7 fluorenylsodium 
• 881-04-9 9H-fluoren-9-yllithium 

Downstream Products

• 88223-08-9 C₁₆H₁₇CsSi 
• 1836-87-9 9-Benzylidene-9H-fluorene 
• 56954-91-7 (9H-fluoren-9-yl)(phenyl)methanol 
• 17057-95-3 1,2,3,4-tetrahydro-9H-fluorene 
• 136453-58-2 2,7-bis(trimethylsilyl)-9-fluorenylmethyl p-chlorocarbanilate 
• 136453-40-2 2,7-bis(trimethylsilyl)-9-fluorenylmethyl carbanilate 
• 68089-94-1 9-Fluorenylmethyl N-p-chlorphenyl carbamate 

Relevant academic research and scientific papers

AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT COMPRISING SAME

An aromatic amine derivative represented by the following formula (1): wherein A1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aromatic group, a substituted or unsubstituted heterocyclic group or an organic group represented by the following formula (2): wherein X1, X2 and X3 are independently a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group; X1 and X2 are linkage groups which are different from each other; and B1, B2 and B3 are independently a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group.

Crystal, molecular, and electronic structure of 9,9′-bis(trimethylsilyl)fluorene

The crystal and molecular structure of 9,9′-bis(trimethylsilyl)fluorene (1) has been determined by X-ray diffraction. The crystal of (1) is orthorhombic, space group Pnma with unit cell dimensions: a = 16.906(2) ?, b = 13.8080(10) ?, c = 8.1690(10) ?, α = β = γ = 90°. The silicon atoms are in a slightly distorted tetrahedral environment with C-Si-C bond angles in the range 107.13°-112.49°. A notable feature of the molecular structure is the significant deviation of the Sil-C9-Si2 angle (118.9°) from the normal tetrahedral value. This behaviour is attributed mainly to some intramolecular CH...π interactions.

Amino acid protecting groups

This invention relates to compounds of the formula a compound of the formula STR1 wherein X is O, CR7 R8, S or NR9 wherein R7 and R8 are independently hydrogen, or lower alkyl, and R9 is lower alkyl; n is 0 or 1; R1 and R2 are independently hydrogen, lower alkyl, monoorganosilyl, diorganosilyl, triorganosilyl, halogen, aryl, or nitro; R3 is hydrogen, lower alkyl, monoorganosilyl, diorganosilyl, triorganosilyl, halogen, 9-fluorenylalkyl, cycloalkyl, aryl or aralkyl; R4 and R5 are independently hydrogen, lower alkyl, or aryl or one of R4 and R5 is 9-fluorenyl; R6 is H or COZ wherein Z is an amino acid, a peptide residue or a leaving group; and with the provisos that when n is 0 and R3 is hydrogen, R1 and R2 are not hydrogen, halogen or nitro; that when n is 0 and R3 is lower alkyl, R1 and R2 are not hydrogen; and that when X is O or CR7 R8 wherein R7 and R8 are H, that R1, R2, R3, R4, R5, and R6 are not all simultaneously H. The compounds of the present invention are useful in peptide synthesis as blocking or protecting groups for reactive groups. The present invention is also directed to a method of protecting a reactive group of an organic molecule during a reaction which modifies a portion of the molecule other than the protected group.