138240-24-1 Usage
Chemical Properties
white to light beige crystalline powder
Check Digit Verification of cas no
The CAS Registry Mumber 138240-24-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,2,4 and 0 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 138240-24:
(8*1)+(7*3)+(6*8)+(5*2)+(4*4)+(3*0)+(2*2)+(1*4)=111
111 % 10 = 1
So 138240-24-1 is a valid CAS Registry Number.
InChI:InChI=1/C30H28O4/c1-2-34-30-25-13-6-14-26(30)18-24-12-5-10-22(29(24)33)16-20-8-3-7-19(27(20)31)15-21-9-4-11-23(17-25)28(21)32/h3-14,31-33H,2,15-18H2,1H3
138240-24-1Relevant articles and documents
Synthesis of monoalkylated calix[4]arenes via direct alkylation
Groenen,Ruel,Casnati,Verboom,Pochini,Ungaro,Reinhoudt
, p. 8379 - 8384 (1991)
A new one-step procedure for the synthesis of monoalkylated calix[4]arenes is presented. Reaction of calis[4]arene 1a or 1b with 1.2 equivalent of a weak base (K2CO3 in MeCN or CsF in DMF) and excess of alkylating agent affords the monoalkylated calix[4]arenes in moderate to good yields.
